diff --git a/package.json b/package.json
index f32c308ca..278dbff2a 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "@codemirror/lang-javascript": "^6.1.1",
+    "@headlessui/react": "^1.7.13",
     "@react-three/drei": "^9.42.0",
     "@react-three/fiber": "^8.9.1",
     "@testing-library/jest-dom": "^5.14.1",
@@ -19,6 +20,7 @@
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-json-view": "^1.21.3",
+    "react-modal-promise": "^1.0.2",
     "react-scripts": "5.0.1",
     "swr": "^2.0.4",
     "three": "^0.146.0",
diff --git a/src/App.tsx b/src/App.tsx
index 6e6c6a378..e775e89d2 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -23,6 +23,7 @@ import { PanelHeader } from './components/PanelHeader'
 import { MemoryPanel } from './components/MemoryPanel'
 import { useHotKeyListener } from './hooks/useHotKeyListener'
 import { Stream } from './components/Stream'
+import ModalContainer from 'react-modal-promise'
 
 const OrrthographicCamera = OrthographicCamera as any
 
@@ -140,6 +141,7 @@ function App() {
   }, [code])
   return (
     <div className="h-screen">
+      <ModalContainer />
       <Allotment snap={true}>
         <Allotment vertical defaultSizes={[4, 1, 1]} minSize={20}>
           <div className="h-full flex flex-col items-start">
diff --git a/src/Toolbar.tsx b/src/Toolbar.tsx
index 3e69de67f..24f08d9c7 100644
--- a/src/Toolbar.tsx
+++ b/src/Toolbar.tsx
@@ -32,7 +32,7 @@ export const Toolbar = () => {
               sketchMode: 'selectFace',
             })
           }}
-          className="border m-1 px-1 rounded"
+          className="border m-1 px-1 rounded text-xs"
         >
           Start Sketch
         </button>
@@ -52,7 +52,7 @@ export const Toolbar = () => {
             )
             updateAst(modifiedAst)
           }}
-          className="border m-1 px-1 rounded"
+          className="border m-1 px-1 rounded text-xs"
         >
           SketchOnFace
         </button>
@@ -68,7 +68,7 @@ export const Toolbar = () => {
               position: guiMode.position,
             })
           }}
-          className="border m-1 px-1 rounded"
+          className="border m-1 px-1 rounded text-xs"
         >
           Edit Sketch
         </button>
@@ -88,7 +88,7 @@ export const Toolbar = () => {
               )
               updateAst(modifiedAst, pathToExtrudeArg)
             }}
-            className="border m-1 px-1 rounded"
+            className="border m-1 px-1 rounded text-xs"
           >
             ExtrudeSketch
           </button>
@@ -106,7 +106,7 @@ export const Toolbar = () => {
               )
               updateAst(modifiedAst, pathToExtrudeArg)
             }}
-            className="border m-1 px-1 rounded"
+            className="border m-1 px-1 rounded text-xs"
           >
             ExtrudeSketch (w/o pipe)
           </button>
@@ -116,7 +116,7 @@ export const Toolbar = () => {
       {guiMode.mode === 'sketch' && (
         <button
           onClick={() => setGuiMode({ mode: 'default' })}
-          className="border m-1 px-1 rounded"
+          className="border m-1 px-1 rounded text-xs"
         >
           Exit sketch
         </button>
@@ -130,7 +130,7 @@ export const Toolbar = () => {
         return (
           <button
             key={sketchFnName}
-            className={`border m-1 px-1 rounded ${
+            className={`border m-0.5 px-0.5 rounded text-xs ${
               guiMode.sketchMode === sketchFnName && 'bg-gray-400'
             }`}
             onClick={() =>
diff --git a/src/components/GetInfoModal.tsx b/src/components/GetInfoModal.tsx
new file mode 100644
index 000000000..e140b88c4
--- /dev/null
+++ b/src/components/GetInfoModal.tsx
@@ -0,0 +1,110 @@
+import { Dialog, Transition } from '@headlessui/react'
+import { Fragment, useState } from 'react'
+
+export const GetInfoModal = ({
+  isOpen,
+  onResolve,
+  onReject,
+  // fields: initialFields,
+  segName: initialSegName,
+  isSegNameEditable,
+  value: initialValue,
+}: {
+  isOpen: boolean
+  onResolve: (a: any) => void
+  onReject: (a: any) => void
+  segName: string
+  isSegNameEditable: boolean
+  value: number
+}) => {
+  const [segName, setSegName] = useState(initialSegName)
+  const [value, setValue] = useState(initialValue)
+
+  return (
+    <Transition appear show={isOpen} as={Fragment}>
+      <Dialog as="div" className="relative z-10" onClose={onResolve}>
+        <Transition.Child
+          as={Fragment}
+          enter="ease-out duration-300"
+          enterFrom="opacity-0"
+          enterTo="opacity-100"
+          leave="ease-in duration-200"
+          leaveFrom="opacity-100"
+          leaveTo="opacity-0"
+        >
+          <div className="fixed inset-0 bg-black bg-opacity-25" />
+        </Transition.Child>
+
+        <div className="fixed inset-0 overflow-y-auto">
+          <div className="flex min-h-full items-center justify-center p-4 text-center">
+            <Transition.Child
+              as={Fragment}
+              enter="ease-out duration-300"
+              enterFrom="opacity-0 scale-95"
+              enterTo="opacity-100 scale-100"
+              leave="ease-in duration-200"
+              leaveFrom="opacity-100 scale-100"
+              leaveTo="opacity-0 scale-95"
+            >
+              <Dialog.Panel className="w-full max-w-md transform overflow-hidden rounded-2xl bg-white p-6 text-left align-middle shadow-xl transition-all">
+                <Dialog.Title
+                  as="h3"
+                  className="text-lg font-medium leading-6 text-gray-900"
+                >
+                  Constraint details
+                </Dialog.Title>
+                <label
+                  htmlFor="val"
+                  className="block text-sm font-medium text-gray-700 mt-3 font-mono"
+                >
+                  Distance
+                </label>
+                <div className="mt-1">
+                  <input
+                    type="number"
+                    name="val"
+                    id="val"
+                    className="shadow-sm focus:ring-blue-500 focus:border-blue-500 block w-full sm:text-sm border-gray-300 rounded-md font-mono"
+                    value={value}
+                    onChange={(e) => {
+                      setValue(Number(e.target.value))
+                    }}
+                  />
+                </div>
+                <label
+                  htmlFor="segName"
+                  className="block text-sm font-medium text-gray-700 mt-3 font-mono"
+                >
+                  Segment Name
+                </label>
+                <div className="mt-1">
+                  <input
+                    type="text"
+                    name="segName"
+                    id="segName"
+                    disabled={!isSegNameEditable}
+                    className="shadow-sm focus:ring-blue-500 focus:border-blue-500 block w-full sm:text-sm border-gray-300 rounded-md font-mono"
+                    value={segName}
+                    onChange={(e) => {
+                      setSegName(e.target.value)
+                    }}
+                  />
+                </div>
+
+                <div className="mt-4">
+                  <button
+                    type="button"
+                    className="inline-flex justify-center rounded-md border border-transparent bg-blue-100 px-4 py-2 text-sm font-medium text-blue-900 hover:bg-blue-200 focus:outline-none focus-visible:ring-2 focus-visible:ring-blue-500 focus-visible:ring-offset-2"
+                    onClick={() => onResolve({ segName, value })}
+                  >
+                    Add constraining value
+                  </button>
+                </div>
+              </Dialog.Panel>
+            </Transition.Child>
+          </div>
+        </div>
+      </Dialog>
+    </Transition>
+  )
+}
diff --git a/src/components/Stream.tsx b/src/components/Stream.tsx
index 2f2b014d4..ecb56402d 100644
--- a/src/components/Stream.tsx
+++ b/src/components/Stream.tsx
@@ -5,6 +5,11 @@ export const Stream = () => {
   const videoRef = useRef<HTMLVideoElement>(null)
 
   useEffect(() => {
+    if (
+      typeof window === 'undefined' ||
+      typeof RTCPeerConnection === 'undefined'
+    )
+      return
     const url = 'wss://dev.api.kittycad.io/ws/channel'
     const [pc, socket] = [new RTCPeerConnection(), new WebSocket(url)]
     // Connection opened
@@ -41,15 +46,15 @@ export const Stream = () => {
             iceServers: message.ice_servers,
           })
           pc.ontrack = function (event) {
-            const el = document.createElement(
-              event.track.kind
-            ) as HTMLVideoElement
-
-            if (videoRef.current) {
-              videoRef.current.srcObject = event.streams[0]
-              videoRef.current.autoplay = true
-              videoRef.current.controls = true
-            }
+            console.log('has element?', videoRef.current)
+            setTimeout(() => {
+              console.log('has element in timeout?', videoRef.current)
+              if (videoRef.current) {
+                videoRef.current.srcObject = event.streams[0]
+                videoRef.current.autoplay = true
+                videoRef.current.controls = true
+              }
+            })
           }
           pc.oniceconnectionstatechange = (e) =>
             console.log(pc.iceConnectionState)
diff --git a/src/components/Toolbar/Equal.tsx b/src/components/Toolbar/Equal.tsx
index aee878380..397dd8698 100644
--- a/src/components/Toolbar/Equal.tsx
+++ b/src/components/Toolbar/Equal.tsx
@@ -8,7 +8,7 @@ import {
 import { isSketchVariablesLinked } from '../../lang/std/sketchConstraints'
 import {
   TransformInfo,
-  transformAstForSketchLines,
+  transformSecondarySketchLinesTagFirst,
   getTransformInfos,
 } from '../../lang/std/sketchcombos'
 
@@ -73,7 +73,7 @@ export const Equal = () => {
         transformInfos &&
         ast &&
         updateAst(
-          transformAstForSketchLines({
+          transformSecondarySketchLinesTagFirst({
             ast,
             selectionRanges,
             transformInfos,
@@ -81,7 +81,7 @@ export const Equal = () => {
           })?.modifiedAst
         )
       }
-      className={`border m-1 px-1 rounded ${
+      className={`border m-1 px-1 rounded text-xs ${
         enableEqual ? 'bg-gray-50 text-gray-800' : 'bg-gray-200 text-gray-400'
       }`}
       disabled={!enableEqual}
diff --git a/src/components/Toolbar/HorzVert.tsx b/src/components/Toolbar/HorzVert.tsx
index 090ee1734..c3ee21942 100644
--- a/src/components/Toolbar/HorzVert.tsx
+++ b/src/components/Toolbar/HorzVert.tsx
@@ -8,7 +8,7 @@ import {
 import {
   TransformInfo,
   getTransformInfos,
-  transformAstForHorzVert,
+  transformAstSketchLines,
 } from '../../lang/std/sketchcombos'
 
 export const HorzVert = ({
@@ -55,15 +55,16 @@ export const HorzVert = ({
         transformInfos &&
         ast &&
         updateAst(
-          transformAstForHorzVert({
+          transformAstSketchLines({
             ast,
             selectionRanges,
             transformInfos,
             programMemory,
+            referenceSegName: '',
           })?.modifiedAst
         )
       }
-      className={`border m-1 px-1 rounded ${
+      className={`border m-1 px-1 rounded text-xs ${
         enableHorz ? 'bg-gray-50 text-gray-800' : 'bg-gray-200 text-gray-400'
       }`}
       disabled={!enableHorz}
diff --git a/src/components/Toolbar/SetHorzDistance.tsx b/src/components/Toolbar/SetHorzDistance.tsx
index 627f3cb56..e8c350db0 100644
--- a/src/components/Toolbar/SetHorzDistance.tsx
+++ b/src/components/Toolbar/SetHorzDistance.tsx
@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react'
+import { create } from 'react-modal-promise'
 import { toolTips, useStore } from '../../useStore'
 import { Value, VariableDeclarator } from '../../lang/abstractSyntaxTree'
 import {
@@ -8,9 +9,13 @@ import {
 import { isSketchVariablesLinked } from '../../lang/std/sketchConstraints'
 import {
   TransformInfo,
-  transformAstForSketchLines,
+  transformSecondarySketchLinesTagFirst,
   getTransformInfos,
 } from '../../lang/std/sketchcombos'
+import { GetInfoModal } from '../GetInfoModal'
+import { createLiteral } from '../../lang/modifyAst'
+
+const getModalInfo = create(GetInfoModal as any)
 
 export const SetHorzDistance = ({
   horOrVert,
@@ -73,23 +78,41 @@ export const SetHorzDistance = ({
 
   return (
     <button
-      onClick={() =>
-        transformInfos &&
-        ast &&
-        updateAst(
-          transformAstForSketchLines({
-            ast,
-            selectionRanges,
-            transformInfos,
-            programMemory,
-          })?.modifiedAst
-        )
-      }
-      className={`border m-1 px-1 rounded ${
+      onClick={async () => {
+        if (transformInfos && ast) {
+          const { modifiedAst, tagInfo, valueUsedInTransform } =
+            transformSecondarySketchLinesTagFirst({
+              ast: JSON.parse(JSON.stringify(ast)),
+              selectionRanges,
+              transformInfos,
+              programMemory,
+            })
+          const { segName, value }: { segName: string; value: number } =
+            await getModalInfo({
+              segName: tagInfo?.tag,
+              isSegNameEditable: !tagInfo?.isTagExisting,
+              value: valueUsedInTransform,
+            } as any)
+          if (segName === tagInfo?.tag && value === valueUsedInTransform) {
+            updateAst(modifiedAst)
+          } else {
+            // transform again but forcing certain values
+            const { modifiedAst } = transformSecondarySketchLinesTagFirst({
+              ast,
+              selectionRanges,
+              transformInfos,
+              programMemory,
+              forceSegName: segName,
+              forceValueUsedInTransform: createLiteral(value),
+            })
+            updateAst(modifiedAst)
+          }
+        }
+      }}
+      className={`border m-1 px-1 rounded text-xs ${
         enable ? 'bg-gray-50 text-gray-800' : 'bg-gray-200 text-gray-400'
       }`}
       disabled={!enable}
-      title="yo dawg"
     >
       {horOrVert}
     </button>
diff --git a/src/lang/modifyAst.test.ts b/src/lang/modifyAst.test.ts
index ec3e8660a..58decb29c 100644
--- a/src/lang/modifyAst.test.ts
+++ b/src/lang/modifyAst.test.ts
@@ -121,16 +121,16 @@ show(part001)`)
 function giveSketchFnCallTagTestHelper(
   code: string,
   searchStr: string
-): { tag: string; newCode: string } {
+): { tag: string; newCode: string; isTagExisting: boolean } {
   // giveSketchFnCallTag inputs and outputs an ast, which is very verbose for testing
   // this wrapper changes the input and output to code
   // making it more of an integration test, but easier to read the test intention is the goal
   const ast = abstractSyntaxTree(lexer(code))
   const start = code.indexOf(searchStr)
   const range: [number, number] = [start, start + searchStr.length]
-  const { modifiedAst, tag } = giveSketchFnCallTag(ast, range)
+  const { modifiedAst, tag, isTagExisting } = giveSketchFnCallTag(ast, range)
   const newCode = recast(modifiedAst)
-  return { tag, newCode }
+  return { tag, newCode, isTagExisting }
 }
 
 describe('Testing giveSketchFnCallTag', () => {
@@ -140,33 +140,36 @@ describe('Testing giveSketchFnCallTag', () => {
 |> line([0.82, 0.34], %)
 show(part001)`
   it('Should add tag to a sketch function call', () => {
-    const { newCode, tag } = giveSketchFnCallTagTestHelper(
+    const { newCode, tag, isTagExisting } = giveSketchFnCallTagTestHelper(
       code,
       'line([0, 0.83], %)'
     )
     expect(newCode).toContain("line({ to: [0, 0.83], tag: 'seg01' }, %)")
     expect(tag).toBe('seg01')
+    expect(isTagExisting).toBe(false)
   })
   it('Should create a unique tag if seg01 already exists', () => {
     let _code = code.replace(
       'line([-2.57, -0.13], %)',
       "line({ to: [-2.57, -0.13], tag: 'seg01' }, %)"
     )
-    const { newCode, tag } = giveSketchFnCallTagTestHelper(
+    const { newCode, tag, isTagExisting } = giveSketchFnCallTagTestHelper(
       _code,
       'line([0, 0.83], %)'
     )
     expect(newCode).toContain("line({ to: [0, 0.83], tag: 'seg02' }, %)")
     expect(tag).toBe('seg02')
+    expect(isTagExisting).toBe(false)
   })
   it('Should return existing tag if it already exists', () => {
     const lineButWithTag = "line({ to: [-2.57, -0.13], tag: 'butts' }, %)"
     let _code = code.replace('line([-2.57, -0.13], %)', lineButWithTag)
-    const { newCode, tag } = giveSketchFnCallTagTestHelper(
+    const { newCode, tag, isTagExisting } = giveSketchFnCallTagTestHelper(
       _code,
       lineButWithTag
     )
     expect(newCode).toContain(lineButWithTag) // no change
     expect(tag).toBe('butts')
+    expect(isTagExisting).toBe(true)
   })
 })
diff --git a/src/lang/modifyAst.ts b/src/lang/modifyAst.ts
index beaf82a5c..b62b50122 100644
--- a/src/lang/modifyAst.ts
+++ b/src/lang/modifyAst.ts
@@ -481,15 +481,17 @@ export function createBinaryExpression([left, operator, right]: [
 
 export function giveSketchFnCallTag(
   ast: Program,
-  range: Range
-): { modifiedAst: Program; tag: string } {
+  range: Range,
+  tag?: string
+): { modifiedAst: Program; tag: string; isTagExisting: boolean } {
   const { node: primaryCallExp } = getNodeFromPath<CallExpression>(
     ast,
     getNodePathFromSourceRange(ast, range)
   )
   const firstArg = getFirstArg(primaryCallExp)
+  const isTagExisting = !!firstArg.tag
   const tagValue = (firstArg.tag ||
-    createLiteral(findUniqueName(ast, 'seg', 2))) as Literal
+    createLiteral(tag || findUniqueName(ast, 'seg', 2))) as Literal
   const tagStr = String(tagValue.value)
   const newFirstArg = createFirstArg(
     primaryCallExp.callee.name as TooTip,
@@ -500,5 +502,6 @@ export function giveSketchFnCallTag(
   return {
     modifiedAst: ast,
     tag: tagStr,
+    isTagExisting,
   }
 }
diff --git a/src/lang/std/sketch.ts b/src/lang/std/sketch.ts
index 30354ac44..1f0a796f5 100644
--- a/src/lang/std/sketch.ts
+++ b/src/lang/std/sketch.ts
@@ -154,15 +154,19 @@ export const lineTo: SketchLineHelper = {
       createLiteral(roundOff(to[1], 2)),
     ]
 
-    const newLine = createCallback
-      ? createCallback(newVals, referencedSegment)
-      : createCallExpression('lineTo', [
-          createArrayExpression(newVals),
-          createPipeSubstitution(),
-        ])
+    const newLine = createCallExpression('lineTo', [
+      createArrayExpression(newVals),
+      createPipeSubstitution(),
+    ])
     const callIndex = getLastIndex(pathToNode)
-    if (replaceExisting) {
-      pipe.body[callIndex] = newLine
+    if (replaceExisting && createCallback) {
+      const boop = createCallback(newVals, referencedSegment)
+      pipe.body[callIndex] = boop.callExp
+      return {
+        modifiedAst: _node,
+        pathToNode,
+        valueUsedInTransform: boop.valueUsedInTransform,
+      }
     } else {
       pipe.body = [...pipe.body, newLine]
     }
@@ -269,7 +273,7 @@ export const line: SketchLineHelper = {
     const newYVal = createLiteral(roundOff(to[1] - from[1], 2))
 
     const newLine = createCallback
-      ? createCallback([newXVal, newYVal])
+      ? createCallback([newXVal, newYVal]).callExp
       : createCallExpression('line', [
           createArrayExpression([newXVal, newYVal]),
           createPipeSubstitution(),
@@ -336,7 +340,7 @@ export const xLineTo: SketchLineHelper = {
 
     const newVal = createLiteral(roundOff(to[0], 2))
     const newLine = createCallback
-      ? createCallback([newVal, newVal])
+      ? createCallback([newVal, newVal]).callExp
       : createCallExpression('xLineTo', [newVal, createPipeSubstitution()])
 
     const callIndex = getLastIndex(pathToNode)
@@ -397,7 +401,7 @@ export const yLineTo: SketchLineHelper = {
 
     const newVal = createLiteral(roundOff(to[1], 2))
     const newLine = createCallback
-      ? createCallback([newVal, newVal])
+      ? createCallback([newVal, newVal]).callExp
       : createCallExpression('yLineTo', [newVal, createPipeSubstitution()])
     const callIndex = getLastIndex(pathToNode)
     if (replaceExisting) {
@@ -454,7 +458,7 @@ export const xLine: SketchLineHelper = {
     const newVal = createLiteral(roundOff(to[0] - from[0], 2))
     const firstArg = newVal
     const newLine = createCallback
-      ? createCallback([firstArg, firstArg])
+      ? createCallback([firstArg, firstArg]).callExp
       : createCallExpression('xLine', [firstArg, createPipeSubstitution()])
     const callIndex = getLastIndex(pathToNode)
     if (replaceExisting) {
@@ -507,7 +511,7 @@ export const yLine: SketchLineHelper = {
     const { node: pipe } = getNode<PipeExpression>('PipeExpression')
     const newVal = createLiteral(roundOff(to[1] - from[1], 2))
     const newLine = createCallback
-      ? createCallback([newVal, newVal])
+      ? createCallback([newVal, newVal]).callExp
       : createCallExpression('yLine', [newVal, createPipeSubstitution()])
     const callIndex = getLastIndex(pathToNode)
     if (replaceExisting) {
@@ -596,7 +600,7 @@ export const angledLine: SketchLineHelper = {
     const newAngleVal = createLiteral(roundOff(getAngle(from, to), 0))
     const newLengthVal = createLiteral(roundOff(getLength(from, to), 2))
     const newLine = createCallback
-      ? createCallback([newAngleVal, newLengthVal])
+      ? createCallback([newAngleVal, newLengthVal]).callExp
       : createCallExpression('angledLine', [
           createArrayExpression([newAngleVal, newLengthVal]),
           createPipeSubstitution(),
@@ -686,7 +690,7 @@ export const angledLineOfXLength: SketchLineHelper = {
     const angle = createLiteral(roundOff(getAngle(from, to), 0))
     const xLength = createLiteral(roundOff(Math.abs(from[0] - to[0]), 2) || 0.1)
     const newLine = createCallback
-      ? createCallback([angle, xLength])
+      ? createCallback([angle, xLength]).callExp
       : createCallExpression('angledLineOfXLength', [
           createArrayExpression([angle, xLength]),
           createPipeSubstitution(),
@@ -780,7 +784,7 @@ export const angledLineOfYLength: SketchLineHelper = {
     const angle = createLiteral(roundOff(getAngle(from, to), 0))
     const yLength = createLiteral(roundOff(Math.abs(from[1] - to[1]), 2) || 0.1)
     const newLine = createCallback
-      ? createCallback([angle, yLength])
+      ? createCallback([angle, yLength]).callExp
       : createCallExpression('angledLineOfYLength', [
           createArrayExpression([angle, yLength]),
           createPipeSubstitution(),
@@ -864,7 +868,7 @@ export const angledLineToX: SketchLineHelper = {
     const angle = createLiteral(roundOff(getAngle(from, to), 0))
     const xArg = createLiteral(roundOff(to[0], 2))
     const newLine = createCallback
-      ? createCallback([angle, xArg])
+      ? createCallback([angle, xArg]).callExp
       : createCallExpression('angledLineToX', [
           createArrayExpression([angle, xArg]),
           createPipeSubstitution(),
@@ -945,7 +949,7 @@ export const angledLineToY: SketchLineHelper = {
     const angle = createLiteral(roundOff(getAngle(from, to), 0))
     const yArg = createLiteral(roundOff(to[1], 2))
     const newLine = createCallback
-      ? createCallback([angle, yArg])
+      ? createCallback([angle, yArg]).callExp
       : createCallExpression('angledLineToY', [
           createArrayExpression([angle, yArg]),
           createPipeSubstitution(),
@@ -1088,13 +1092,13 @@ export function replaceSketchLine({
   from: [number, number]
   createCallback: TransformCallback
   referencedSegment?: Path
-}): { modifiedAst: Program } {
+}): { modifiedAst: Program; valueUsedInTransform?: number } {
   if (!toolTips.includes(fnName)) throw new Error('not a tooltip')
   const _node = { ...node }
   const thePath = getNodePathFromSourceRange(_node, sourceRange)
 
   const { add } = sketchLineHelperMap[fnName]
-  const { modifiedAst } = add({
+  const { modifiedAst, valueUsedInTransform } = add({
     node: _node,
     previousProgramMemory: programMemory,
     pathToNode: thePath,
@@ -1104,7 +1108,7 @@ export function replaceSketchLine({
     replaceExisting: true,
     createCallback,
   })
-  return { modifiedAst }
+  return { modifiedAst, valueUsedInTransform }
 }
 
 export function addTagForSketchOnFace(
diff --git a/src/lang/std/sketchConstraints.test.ts b/src/lang/std/sketchConstraints.test.ts
index 72813ca73..510f97c74 100644
--- a/src/lang/std/sketchConstraints.test.ts
+++ b/src/lang/std/sketchConstraints.test.ts
@@ -4,7 +4,7 @@ import { lexer } from '../tokeniser'
 import {
   ConstraintType,
   getTransformInfos,
-  transformAstForHorzVert,
+  transformAstSketchLines,
 } from './sketchcombos'
 import { recast } from '../recast'
 import { initPromise } from '../rust'
@@ -32,11 +32,12 @@ function testingSwapSketchFnCall({
   const transformInfos = getTransformInfos([range], ast, constraintType)
 
   if (!transformInfos) throw new Error('nope')
-  const { modifiedAst } = transformAstForHorzVert({
+  const { modifiedAst } = transformAstSketchLines({
     ast,
     programMemory,
     selectionRanges: [range],
     transformInfos,
+    referenceSegName: '',
   })
   return {
     newCode: recast(modifiedAst),
diff --git a/src/lang/std/sketchcombos.test.ts b/src/lang/std/sketchcombos.test.ts
index d57fffad4..d46217632 100644
--- a/src/lang/std/sketchcombos.test.ts
+++ b/src/lang/std/sketchcombos.test.ts
@@ -3,8 +3,8 @@ import { lexer } from '../tokeniser'
 import {
   getConstraintType,
   getTransformInfos,
-  transformAstForSketchLines,
-  transformAstForHorzVert,
+  transformAstSketchLines,
+  transformSecondarySketchLinesTagFirst,
   ConstraintType,
 } from './sketchcombos'
 import { initPromise } from '../rust'
@@ -204,7 +204,7 @@ show(part001)`
       'equalLength'
     )
 
-    const newAst = transformAstForSketchLines({
+    const newAst = transformSecondarySketchLinesTagFirst({
       ast,
       selectionRanges,
       transformInfos,
@@ -282,11 +282,12 @@ show(part001)`
     const programMemory = executor(ast)
     const transformInfos = getTransformInfos(selectionRanges, ast, 'horizontal')
 
-    const newAst = transformAstForHorzVert({
+    const newAst = transformAstSketchLines({
       ast,
       selectionRanges,
       transformInfos,
       programMemory,
+      referenceSegName: '',
     })?.modifiedAst
     const newCode = recast(newAst)
     expect(newCode).toBe(expectModifiedScript)
@@ -331,11 +332,12 @@ show(part001)`
     const programMemory = executor(ast)
     const transformInfos = getTransformInfos(selectionRanges, ast, 'vertical')
 
-    const newAst = transformAstForHorzVert({
+    const newAst = transformAstSketchLines({
       ast,
       selectionRanges,
       transformInfos,
       programMemory,
+      referenceSegName: '',
     })?.modifiedAst
     const newCode = recast(newAst)
     expect(newCode).toBe(expectModifiedScript)
@@ -419,7 +421,7 @@ function helperThing(
     constraint
   )
 
-  const newAst = transformAstForSketchLines({
+  const newAst = transformSecondarySketchLinesTagFirst({
     ast,
     selectionRanges,
     transformInfos,
diff --git a/src/lang/std/sketchcombos.ts b/src/lang/std/sketchcombos.ts
index adb5149c6..37cb8f9fb 100644
--- a/src/lang/std/sketchcombos.ts
+++ b/src/lang/std/sketchcombos.ts
@@ -1,5 +1,5 @@
 import { TransformCallback } from './stdTypes'
-import { Range, Ranges, toolTips, TooTip } from '../../useStore'
+import { Ranges, toolTips, TooTip } from '../../useStore'
 import {
   BinaryPart,
   CallExpression,
@@ -21,7 +21,7 @@ import {
   giveSketchFnCallTag,
 } from '../modifyAst'
 import { createFirstArg, getFirstArg, replaceSketchLine } from './sketch'
-import { Path, ProgramMemory } from '../executor'
+import { ProgramMemory } from '../executor'
 import { getSketchSegmentIndexFromSourceRange } from './sketchConstraints'
 import { roundOff } from '../../lib/utils'
 
@@ -44,46 +44,16 @@ export type ConstraintType =
 function createCallWrapper(
   a: TooTip,
   val: [Value, Value] | Value,
-  tag?: Value
-) {
-  return createCallExpression(a, [
-    createFirstArg(a, val, tag),
-    createPipeSubstitution(),
-  ])
-}
-
-export function replaceSketchCall(
-  programMemory: ProgramMemory,
-  ast: Program,
-  range: Range,
-  transformTo: TooTip,
-  createCallback: TransformCallback,
-  referenceSegName: string
-): { modifiedAst: Program } {
-  const path = getNodePathFromSourceRange(ast, range)
-  const getNode = getNodeFromPathCurry(ast, path)
-  const varDec = getNode<VariableDeclarator>('VariableDeclarator').node
-  const callExp = getNode<CallExpression>('CallExpression').node
-  const varName = varDec.id.name
-  const sketchGroup = programMemory.root?.[varName]
-  if (!sketchGroup || sketchGroup.type !== 'sketchGroup')
-    throw new Error('not a sketch group')
-  const seg = getSketchSegmentIndexFromSourceRange(sketchGroup, range)
-  const referencedSegment = sketchGroup.value.find(
-    (path) => path.name === referenceSegName
-  )
-  const { to, from } = seg
-  const { modifiedAst } = replaceSketchLine({
-    node: ast,
-    programMemory,
-    sourceRange: range,
-    referencedSegment,
-    fnName: transformTo || (callExp.callee.name as TooTip),
-    to,
-    from,
-    createCallback,
-  })
-  return { modifiedAst }
+  tag?: Value,
+  valueUsedInTransform?: number
+): ReturnType<TransformCallback> {
+  return {
+    callExp: createCallExpression(a, [
+      createFirstArg(a, val, tag),
+      createPipeSubstitution(),
+    ]),
+    valueUsedInTransform,
+  }
 }
 
 export type TransformInfo = {
@@ -93,7 +63,8 @@ export type TransformInfo = {
     varValB: Value // y / length or x y for angledLineOfXlength etc
     referenceSegName: string
     tag?: Value
-  }) => (args: [Value, Value], referencedSegment?: Path) => Value
+    forceValueUsedInTransform?: Value
+  }) => TransformCallback
 }
 
 type TransformMap = {
@@ -172,23 +143,27 @@ const getAngleLengthSign = (arg: Value, legAngleVal: BinaryPart) => {
 }
 
 const setHorzVertDistanceCreateNode =
-  (isX = true): TransformInfo['createNode'] =>
-  ({ referenceSegName, tag }) => {
+  (
+    xOrY: 'x' | 'y',
+    index = xOrY === 'x' ? 0 : 1
+  ): TransformInfo['createNode'] =>
+  ({ referenceSegName, tag, forceValueUsedInTransform }) => {
     return (args, referencedSegment) => {
-      const makeBinExp = (index: 0 | 1) => {
-        const arg = getArgLiteralVal(args?.[index])
-        return createBinaryExpression([
-          createSegEnd(referenceSegName, isX),
-          '+',
-          createLiteral(
-            roundOff(arg - (referencedSegment?.to?.[index] || 0), 2)
-          ),
-        ])
-      }
+      const valueUsedInTransform = roundOff(
+        getArgLiteralVal(args?.[index]) - (referencedSegment?.to?.[index] || 0),
+        2
+      )
+      const makeBinExp = createBinaryExpression([
+        createSegEnd(referenceSegName, !index),
+        '+',
+        (forceValueUsedInTransform as BinaryPart) ||
+          createLiteral(valueUsedInTransform),
+      ])
       return createCallWrapper(
         'lineTo',
-        isX ? [makeBinExp(0), args[1]] : [args[0], makeBinExp(1)],
-        tag
+        !index ? [makeBinExp, args[1]] : [args[0], makeBinExp],
+        tag,
+        valueUsedInTransform
       )
     }
   }
@@ -301,11 +276,11 @@ const transformMap: TransformMap = {
       },
       setHorzDistance: {
         tooltip: 'lineTo',
-        createNode: setHorzVertDistanceCreateNode(true),
+        createNode: setHorzVertDistanceCreateNode('x'),
       },
       setVertDistance: {
         tooltip: 'lineTo',
-        createNode: setHorzVertDistanceCreateNode(false),
+        createNode: setHorzVertDistanceCreateNode('y'),
       },
     },
   },
@@ -826,99 +801,120 @@ export function getTransformInfos(
   return theTransforms
 }
 
-export function transformAstForSketchLines({
+export function transformSecondarySketchLinesTagFirst({
   ast,
   selectionRanges,
   transformInfos,
   programMemory,
+  forceSegName,
+  forceValueUsedInTransform,
 }: {
   ast: Program
   selectionRanges: Ranges
   transformInfos: TransformInfo[]
   programMemory: ProgramMemory
-}): { modifiedAst: Program } {
-  // deep clone since we are mutating in a loop, of which any could fail
-  let node = JSON.parse(JSON.stringify(ast))
+  forceSegName?: string
+  forceValueUsedInTransform?: Value
+}): {
+  modifiedAst: Program
+  valueUsedInTransform?: number
+  tagInfo: {
+    tag: string
+    isTagExisting: boolean
+  }
+} {
+  // let node = JSON.parse(JSON.stringify(ast))
   const primarySelection = selectionRanges[0]
 
-  const { modifiedAst, tag } = giveSketchFnCallTag(node, primarySelection)
-  node = modifiedAst
+  const { modifiedAst, tag, isTagExisting } = giveSketchFnCallTag(
+    ast,
+    primarySelection,
+    forceSegName
+  )
 
-  selectionRanges.slice(1).forEach((range, index) => {
+  return {
+    ...transformAstSketchLines({
+      ast: modifiedAst,
+      selectionRanges: selectionRanges.slice(1),
+      transformInfos,
+      programMemory,
+      referenceSegName: tag,
+      forceValueUsedInTransform,
+    }),
+    tagInfo: {
+      tag,
+      isTagExisting,
+    },
+  }
+}
+
+export function transformAstSketchLines({
+  ast,
+  selectionRanges,
+  transformInfos,
+  programMemory,
+  referenceSegName,
+  forceValueUsedInTransform,
+}: {
+  ast: Program
+  selectionRanges: Ranges
+  transformInfos: TransformInfo[]
+  programMemory: ProgramMemory
+  referenceSegName: string
+  forceValueUsedInTransform?: Value
+}): { modifiedAst: Program; valueUsedInTransform?: number } {
+  // deep clone since we are mutating in a loop, of which any could fail
+  let node = JSON.parse(JSON.stringify(ast))
+  let _valueUsedInTransform // TODO should this be an array?
+
+  selectionRanges.forEach((range, index) => {
     const callBack = transformInfos?.[index].createNode
     const transformTo = transformInfos?.[index].tooltip
     if (!callBack || !transformTo) throw new Error('no callback helper')
 
-    const callExpPath = getNodePathFromSourceRange(node, range)
-    const callExp = getNodeFromPath<CallExpression>(
+    const getNode = getNodeFromPathCurry(
       node,
-      callExpPath,
-      'CallExpression'
-    )?.node
-    const { val } = getFirstArg(callExp)
+      getNodePathFromSourceRange(node, range)
+    )
+
+    const callExp = getNode<CallExpression>('CallExpression')?.node
+    const varDec = getNode<VariableDeclarator>('VariableDeclarator').node
+
+    const { val, tag: callBackTag } = getFirstArg(callExp)
     const [varValA, varValB] = Array.isArray(val) ? val : [val, val]
 
-    const { modifiedAst } = replaceSketchCall(
+    const varName = varDec.id.name
+    const sketchGroup = programMemory.root?.[varName]
+    if (!sketchGroup || sketchGroup.type !== 'sketchGroup')
+      throw new Error('not a sketch group')
+    const seg = getSketchSegmentIndexFromSourceRange(sketchGroup, range)
+    const referencedSegment = sketchGroup.value.find(
+      (path) => path.name === referenceSegName
+    )
+    const { to, from } = seg
+    const { modifiedAst, valueUsedInTransform } = replaceSketchLine({
+      node: node,
       programMemory,
-      node,
-      range,
-      transformTo,
-      callBack({
-        referenceSegName: tag,
+      sourceRange: range,
+      referencedSegment,
+      fnName: transformTo || (callExp.callee.name as TooTip),
+      to,
+      from,
+      createCallback: callBack({
+        referenceSegName,
         varValA,
         varValB,
+        tag: callBackTag,
+        forceValueUsedInTransform,
       }),
-      tag
-    )
+    })
+
     node = modifiedAst
+    if (typeof valueUsedInTransform === 'number') {
+      _valueUsedInTransform = valueUsedInTransform
+    }
   })
-  return { modifiedAst: node }
-}
-
-export function transformAstForHorzVert({
-  ast,
-  selectionRanges,
-  transformInfos,
-  programMemory,
-}: {
-  ast: Program
-  selectionRanges: Ranges
-  transformInfos: TransformInfo[]
-  programMemory: ProgramMemory
-}): { modifiedAst: Program } {
-  // deep clone since we are mutating in a loop, of which any could fail
-  let node = JSON.parse(JSON.stringify(ast))
-
-  selectionRanges.forEach((range, index) => {
-    const callBack = transformInfos?.[index]?.createNode
-    const transformTo = transformInfos?.[index].tooltip
-    if (!callBack || !transformTo) throw new Error('no callback helper')
-
-    const callExpPath = getNodePathFromSourceRange(node, range)
-    const callExp = getNodeFromPath<CallExpression>(
-      node,
-      callExpPath,
-      'CallExpression'
-    )?.node
-    const { val, tag } = getFirstArg(callExp)
-    const [varValA, varValB] = Array.isArray(val) ? val : [val, val]
-
-    const { modifiedAst } = replaceSketchCall(
-      programMemory,
-      node,
-      range,
-      transformTo,
-      callBack({
-        referenceSegName: '',
-        varValA,
-        varValB,
-        tag,
-      }),
-      tag?.type === 'Literal' ? String(tag.value) : ''
-    )
-    node = modifiedAst
-  })
-  return { modifiedAst: node }
+  return { modifiedAst: node, valueUsedInTransform: _valueUsedInTransform }
 }
 
 function createSegLen(referenceSegName: string): Value {
diff --git a/src/lang/std/stdTypes.ts b/src/lang/std/stdTypes.ts
index 98d203740..a2bd72550 100644
--- a/src/lang/std/stdTypes.ts
+++ b/src/lang/std/stdTypes.ts
@@ -70,7 +70,10 @@ interface updateArgs extends ModifyAstBase {
 export type TransformCallback = (
   args: [Value, Value],
   referencedSegment?: Path
-) => Value
+) => {
+  callExp: Value
+  valueUsedInTransform?: number
+}
 
 export type SketchCallTransfromMap = {
   [key in TooTip]: TransformCallback
@@ -81,6 +84,7 @@ export interface SketchLineHelper {
   add: (a: addCall) => {
     modifiedAst: Program
     pathToNode: (string | number)[]
+    valueUsedInTransform?: number
   }
   updateArgs: (a: updateArgs) => {
     modifiedAst: Program
diff --git a/yarn.lock b/yarn.lock
index 2f21d5c1c..806d73f4e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1559,6 +1559,13 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
+"@headlessui/react@^1.7.13":
+  version "1.7.13"
+  resolved "https://registry.yarnpkg.com/@headlessui/react/-/react-1.7.13.tgz#fd150b394954e9f1d86ed2340cffd1217d6e7628"
+  integrity sha512-9n+EQKRtD9266xIHXdY5MfiXPDfYwl7zBM7KOx2Ae3Gdgxy8QML1FkCMjq6AsOf0l6N9uvI4HcFtuFlenaldKg==
+  dependencies:
+    client-only "^0.0.1"
+
 "@humanwhocodes/config-array@^0.11.6":
   version "0.11.7"
   resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.7.tgz#38aec044c6c828f6ed51d5d7ae3d9b9faf6dbb0f"
@@ -3752,6 +3759,11 @@ clean-css@^5.2.2:
   dependencies:
     source-map "~0.6.0"
 
+client-only@^0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/client-only/-/client-only-0.0.1.tgz#38bba5d403c41ab150bff64a95c85013cf73bca1"
+  integrity sha512-IV3Ou0jSMzZrd3pZ48nLkT9DA7Ag1pnPzaiQhpW7c3RbcqqzvzzVu+L8gfqMp/8IM2MQtSiqaCxrrcfu8I8rMA==
+
 cliui@^7.0.2:
   version "7.0.4"
   resolved "https://registry.yarnpkg.com/cliui/-/cliui-7.0.4.tgz#a0265ee655476fc807aea9df3df8df7783808b4f"
@@ -8708,6 +8720,11 @@ react-merge-refs@^1.1.0:
   resolved "https://registry.yarnpkg.com/react-merge-refs/-/react-merge-refs-1.1.0.tgz#73d88b892c6c68cbb7a66e0800faa374f4c38b06"
   integrity sha512-alTKsjEL0dKH/ru1Iyn7vliS2QRcBp9zZPGoWxUOvRGWPUYgjo+V01is7p04It6KhgrzhJGnIj9GgX8W4bZoCQ==
 
+react-modal-promise@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/react-modal-promise/-/react-modal-promise-1.0.2.tgz#122620b7f19eec73683affadfa77c543d88edc40"
+  integrity sha512-dqT618ROhG8qh1+O6EZkia5ELw3zaZWGpMX2YfEH4bgwYENPuFonqKw1W70LFx3K/SCZvVBcD6UYEI12yzYXzg==
+
 react-reconciler@^0.27.0:
   version "0.27.0"
   resolved "https://registry.yarnpkg.com/react-reconciler/-/react-reconciler-0.27.0.tgz#360124fdf2d76447c7491ee5f0e04503ed9acf5b"