diff --git a/src/app/MetaBrush/Application.hs b/src/app/MetaBrush/Application.hs
index a395d82..ce73565 100644
--- a/src/app/MetaBrush/Application.hs
+++ b/src/app/MetaBrush/Application.hs
@@ -202,7 +202,7 @@ runApplication application = do
     testDocuments = newHistory <$> Map.fromList
       [ ( docUnique, testDoc ) ]
 
-  recomputeStrokesTVar   <- STM.newTVarIO False
+  redrawStrokesTVar      <- STM.newTVarIO False
   documentRenderTVar     <- STM.newTVarIO ( const $ pure () )
   activeDocumentTVar     <- STM.newTVarIO Nothing
   openDocumentsTVar      <- STM.newTVarIO testDocuments
@@ -344,8 +344,8 @@ runApplication application = do
   -- Update the document render data in a separate thread.
   _ <- forkIO $ forever do
       getRenderDoc <- STM.atomically do
-        needsRecomputation <- STM.readTVar recomputeStrokesTVar
-        case needsRecomputation of
+        needsRedraw <- STM.readTVar redrawStrokesTVar
+        case needsRedraw of
           False -> STM.retry
           True  -> do
             mbDocNow <- fmap ( present . snd ) <$> activeDocument variables
@@ -362,7 +362,7 @@ runApplication application = do
                 fitParameters  <- STM.readTVar fitParametersTVar
                 rootsAlgo      <- STM.readTVar rootsAlgoTVar
                 mbCuspOptions  <- STM.readTVar cuspFindingOptionsTVar
-                STM.writeTVar recomputeStrokesTVar False
+                STM.writeTVar redrawStrokesTVar False
                 let
                   addRulers :: ( ( Int32, Int32 ) -> Cairo.Render () ) -> ( ( Int32, Int32 ) -> Cairo.Render () ) 
                   addRulers newRender viewportSize = do
diff --git a/src/app/MetaBrush/Application/Action.hs b/src/app/MetaBrush/Application/Action.hs
index f057449..bf350a6 100644
--- a/src/app/MetaBrush/Application/Action.hs
+++ b/src/app/MetaBrush/Application/Action.hs
@@ -678,7 +678,7 @@ data ToggleGuides = ToggleGuides
   deriving stock Show
 
 instance HandleAction ToggleGuides where
-  handleAction ( UIElements { viewport = Viewport {..} } ) ( Variables { recomputeStrokesTVar, showGuidesTVar } ) _ = do
+  handleAction ( UIElements { viewport = Viewport {..} } ) ( Variables { redrawStrokesTVar, showGuidesTVar } ) _ = do
     _guidesWereShown <- STM.atomically do
       guidesWereShown <- STM.readTVar showGuidesTVar
       STM.writeTVar showGuidesTVar ( not guidesWereShown )
@@ -692,7 +692,7 @@ instance HandleAction ToggleGuides where
     --  toggleGuidesWidget = menuItemWidget . toggleGuides . sectionItems . viewMenu4 . menuItemSubmenu . view
     --                     $ menuObject
     --GTK.buttonSetLabel toggleGuidesWidget newText
-    STM.atomically ( STM.writeTVar recomputeStrokesTVar True )
+    STM.atomically ( STM.writeTVar redrawStrokesTVar True )
     for_ [ rulerCornerDrawingArea, topRulerDrawingArea, leftRulerDrawingArea ] \ drawingArea -> do
       GTK.widgetQueueDraw drawingArea
 
@@ -714,7 +714,7 @@ instance HandleAction Confirm where
           -- End ongoing drawing on pressing enter key.
           Pen -> do
             STM.writeTVar partialPathTVar Nothing
-            STM.writeTVar recomputeStrokesTVar True
+            STM.writeTVar redrawStrokesTVar True
           _ -> pure ()
 
 ----------------
@@ -812,7 +812,7 @@ instance HandleAction MouseMove where
         tool <- STM.readTVar toolTVar
         mbPartialPath <- STM.readTVar partialPathTVar
         mode <- STM.readTVar modeTVar
-        STM.writeTVar recomputeStrokesTVar True -- need to keep updating for mouse hover updates
+        STM.writeTVar redrawStrokesTVar True -- need to keep updating for mouse hover updates
         if
           | Pen <- tool
           , Just pp <- mbPartialPath
@@ -1041,7 +1041,7 @@ instance HandleAction MouseClick where
       -- Right mouse button: end partial path.
       3 -> STM.atomically do
         STM.writeTVar partialPathTVar Nothing
-        STM.writeTVar recomputeStrokesTVar True
+        STM.writeTVar redrawStrokesTVar True
 
       -- Other mouse buttons: ignored (for the moment at least).
       _ -> pure ()
@@ -1370,7 +1370,7 @@ instance HandleAction KeyboardPress where
                 , Just pp <- mbPartialPath
                 -> STM.atomically do
                     STM.writeTVar partialPathTVar ( Just $ pp { partialControlPoint = Just mp } )
-                    STM.writeTVar recomputeStrokesTVar True
+                    STM.writeTVar redrawStrokesTVar True
               _ -> pure ()
 
         _ -> pure ()
diff --git a/src/app/MetaBrush/Application/Context.hs b/src/app/MetaBrush/Application/Context.hs
index 337392e..7336a62 100644
--- a/src/app/MetaBrush/Application/Context.hs
+++ b/src/app/MetaBrush/Application/Context.hs
@@ -99,7 +99,7 @@ data UIElements
 data Variables
   = Variables
   { uniqueSupply           :: !UniqueSupply
-  , recomputeStrokesTVar   :: !( STM.TVar Bool                                    )
+  , redrawStrokesTVar      :: !( STM.TVar Bool                                    )
   , documentRenderTVar     :: !( STM.TVar ( ( Int32, Int32 ) -> Cairo.Render () ) )
   , activeDocumentTVar     :: !( STM.TVar ( Maybe Unique )                        )
   , openDocumentsTVar      :: !( STM.TVar ( Map Unique DocumentHistory )          )
diff --git a/src/app/MetaBrush/Application/UpdateDocument.hs b/src/app/MetaBrush/Application/UpdateDocument.hs
index aad7bba..e119d00 100644
--- a/src/app/MetaBrush/Application/UpdateDocument.hs
+++ b/src/app/MetaBrush/Application/UpdateDocument.hs
@@ -231,7 +231,7 @@ updateUIAction _docChange uiElts@( UIElements { viewport = Viewport {..}, .. } )
       GTK.widgetQueueDraw fileBarTab
       GTK.widgetQueueDraw fileBarTabCloseArea
       updateHistoryState uiElts ( fmap snd mbDocHist )
-      STM.atomically ( STM.writeTVar recomputeStrokesTVar True )
+      STM.atomically ( STM.writeTVar redrawStrokesTVar True )
 
 updateTitle :: GTK.IsWindow window => window -> GTK.Label -> Maybe ( Text, Bool ) -> IO ()
 updateTitle window titleLabel mbTitleText = do
diff --git a/src/app/MetaBrush/UI/ToolBar.hs b/src/app/MetaBrush/UI/ToolBar.hs
index 1ea6a66..449bb3f 100644
--- a/src/app/MetaBrush/UI/ToolBar.hs
+++ b/src/app/MetaBrush/UI/ToolBar.hs
@@ -56,7 +56,7 @@ createToolBar ( Variables {..} ) colours toolBar = do
       ( second \ toolVal -> STM.atomically do
         STM.writeTVar toolTVar toolVal
         STM.writeTVar partialPathTVar Nothing
-        STM.writeTVar recomputeStrokesTVar True
+        STM.writeTVar redrawStrokesTVar True
       )
       [ ( selectionTool, Selection ), ( penTool, Pen ) ]
   GTK.toggleButtonSetActive selectionTool True
@@ -73,7 +73,7 @@ createToolBar ( Variables {..} ) colours toolBar = do
       ( second \ modeVal -> STM.atomically do
         STM.writeTVar modeTVar modeVal
         STM.writeTVar partialPathTVar Nothing
-        STM.writeTVar recomputeStrokesTVar True
+        STM.writeTVar redrawStrokesTVar True
       )
       [ ( pathTool, PathMode ), ( brushTool, BrushMode ), ( metaTool, MetaMode ) ]
   GTK.toggleButtonSetActive pathTool True
@@ -87,7 +87,7 @@ createToolBar ( Variables {..} ) colours toolBar = do
     STM.atomically do
       STM.writeTVar debugTVar clicked
       STM.writeTVar partialPathTVar Nothing
-      STM.writeTVar recomputeStrokesTVar True
+      STM.writeTVar redrawStrokesTVar True
 
   GTK.boxAppend toolBar selectionTool
   GTK.boxAppend toolBar       penTool