diff --git a/GlyphConstruction.roboFontExt/info.plist b/GlyphConstruction.roboFontExt/info.plist
index 237eba8..c90c80e 100644
--- a/GlyphConstruction.roboFontExt/info.plist
+++ b/GlyphConstruction.roboFontExt/info.plist
@@ -30,7 +30,7 @@
 	<key>requiresVersionMinor</key>
 	<string>5</string>
 	<key>timeStamp</key>
-	<real>1679000061.4736819</real>
+	<real>1680895559.418968</real>
 	<key>version</key>
 	<string>0.13</string>
 </dict>
diff --git a/GlyphConstruction.roboFontExt/lib/glyphConstructionController.py b/GlyphConstruction.roboFontExt/lib/glyphConstructionController.py
index b6294f6..b0b1dad 100644
--- a/GlyphConstruction.roboFontExt/lib/glyphConstructionController.py
+++ b/GlyphConstruction.roboFontExt/lib/glyphConstructionController.py
@@ -383,7 +383,6 @@ def __init__(self, constructions, font, parentWindow, shouldOverWrite=None, shou
         self.constructions = constructions
 
         self.w = Sheet((300, 170), parentWindow=parentWindow)
-        getExtensionDefault, setExtensionDefault, getExtensionDefaultColor, setExtensionDefaultColor
         y = 15
         if shouldOverWrite is None:
             shouldOverWrite = getExtensionDefault(self.overWriteKey, True)
@@ -494,11 +493,15 @@ class GlyphBuilderController(BaseWindowController):
     fileNameKey = "%s.lastSavedFileName" % defaultKey
     glyphLibConstructionKey = "%s.construction" % defaultKey
 
+    isLiveUpdatingKey = "%s.liveUpdating" % defaultKey
+
     def __init__(self, font):
         self.font = None
         self._glyphs = []
         self._filePath = None
 
+        self.isLiveUpdating = getExtensionDefault(self.isLiveUpdatingKey, True)
+
         statusBarHeight = 20
 
         self.w = GlyphConstructionWindow((900, 700), "Glyph Builder", minSize=(400, 400))
@@ -586,18 +589,20 @@ def __init__(self, font):
         # self.w.split.showPane("analyser", True)
 
         self.w.statusBar = StatusBar((0, -statusBarHeight, -0, statusBarHeight))
-        self.w.statusBar.hiddenReload = Button((0, 0, -0, -0), "Reload", self.reload)
+        self.w.statusBar.hiddenReload = Button((0, 0, 1, 1), "Reload", self.reload)
         button = self.w.statusBar.hiddenReload.getNSButton()
         button.setBezelStyle_(AppKit.NSRoundRectBezelStyle)
         button.setAlphaValue_(0)
         self.w.statusBar.hiddenReload.bind("\r", ["command"])
 
-        self.w.statusBar.hiddenSave = Button((0, 0, -0, -0), "Reload", self.saveFile)
+        self.w.statusBar.hiddenSave = Button((0, 0, 1, 1), "Reload", self.saveFile)
         button = self.w.statusBar.hiddenSave.getNSButton()
         button.setBezelStyle_(AppKit.NSRoundRectBezelStyle)
         button.setAlphaValue_(0)
         self.w.statusBar.hiddenSave.bind("s", ["command"])
 
+        self.w.statusBar.liveUpdating = CheckBox((10, 0, 100, 18), "Live Updates", value=self.isLiveUpdating, sizeStyle="mini", callback=self.liveUpdatingCallback)
+
         self.subscribeFont(font)
         self.setUpBaseWindowBehavior()
 
@@ -620,6 +625,9 @@ def unsubscribeFont(self):
             self.font.removeObserver(self, notification="Font.Changed")
             self.font = None
 
+    def liveUpdatingCallback(self, sender):
+        self.isLiveUpdating = sender.get()
+
     def constructionsCallback(self, sender, update=True):
         if self.font is None:
             return
@@ -860,7 +868,8 @@ def analyse(self, sender=None):
     # notifications
 
     def fontChanged(self, notification):
-        self.reload()
+        if self.isLiveUpdating:
+            self.reload()
 
     def fontBecameCurrent(self, notification):
         font = notification["font"]
@@ -869,10 +878,14 @@ def fontBecameCurrent(self, notification):
     def fontResignCurrent(self, notification):
         self.unsubscribeFont()
 
+    def windowSelectCallback(self, sender):
+        self.reload()
+
     def windowCloseCallback(self, sender):
         self.unsubscribeFont()
         removeObserver(self, "fontBecameCurrent")
         removeObserver(self, "fontResignCurrent")
+        setExtensionDefault(self.isLiveUpdatingKey, self.w.statusBar.liveUpdating.get())
         super(GlyphBuilderController, self).windowCloseCallback(sender)
 
 
diff --git a/LibExtension/glyphConstructionController.py b/LibExtension/glyphConstructionController.py
index b6294f6..9bea3e7 100644
--- a/LibExtension/glyphConstructionController.py
+++ b/LibExtension/glyphConstructionController.py
@@ -383,7 +383,6 @@ def __init__(self, constructions, font, parentWindow, shouldOverWrite=None, shou
         self.constructions = constructions
 
         self.w = Sheet((300, 170), parentWindow=parentWindow)
-        getExtensionDefault, setExtensionDefault, getExtensionDefaultColor, setExtensionDefaultColor
         y = 15
         if shouldOverWrite is None:
             shouldOverWrite = getExtensionDefault(self.overWriteKey, True)
@@ -494,11 +493,15 @@ class GlyphBuilderController(BaseWindowController):
     fileNameKey = "%s.lastSavedFileName" % defaultKey
     glyphLibConstructionKey = "%s.construction" % defaultKey
 
+    isLiveUpdatingKey = "%s.liveUpdating" % defaultKey
+
     def __init__(self, font):
         self.font = None
         self._glyphs = []
         self._filePath = None
 
+        self.isLiveUpdating = getExtensionDefault(self.isLiveUpdatingKey, True)
+
         statusBarHeight = 20
 
         self.w = GlyphConstructionWindow((900, 700), "Glyph Builder", minSize=(400, 400))
@@ -586,18 +589,20 @@ def __init__(self, font):
         # self.w.split.showPane("analyser", True)
 
         self.w.statusBar = StatusBar((0, -statusBarHeight, -0, statusBarHeight))
-        self.w.statusBar.hiddenReload = Button((0, 0, -0, -0), "Reload", self.reload)
+        self.w.statusBar.hiddenReload = Button((0, 0, 1, 1), "Reload", self.reload)
         button = self.w.statusBar.hiddenReload.getNSButton()
         button.setBezelStyle_(AppKit.NSRoundRectBezelStyle)
         button.setAlphaValue_(0)
         self.w.statusBar.hiddenReload.bind("\r", ["command"])
 
-        self.w.statusBar.hiddenSave = Button((0, 0, -0, -0), "Reload", self.saveFile)
+        self.w.statusBar.hiddenSave = Button((0, 0, 1, 1), "Reload", self.saveFile)
         button = self.w.statusBar.hiddenSave.getNSButton()
         button.setBezelStyle_(AppKit.NSRoundRectBezelStyle)
         button.setAlphaValue_(0)
         self.w.statusBar.hiddenSave.bind("s", ["command"])
 
+        self.w.statusBar.liveUpdating = CheckBox((10, 0, 100, 18), "Live Updates", value=self.isLiveUpdating, sizeStyle="mini", callback=self.liveUpdatingCallback)
+
         self.subscribeFont(font)
         self.setUpBaseWindowBehavior()
 
@@ -620,6 +625,9 @@ def unsubscribeFont(self):
             self.font.removeObserver(self, notification="Font.Changed")
             self.font = None
 
+    def liveUpdatingCallback(self, sender):
+        self.isLiveUpdating = sender.get()
+
     def constructionsCallback(self, sender, update=True):
         if self.font is None:
             return
@@ -860,7 +868,8 @@ def analyse(self, sender=None):
     # notifications
 
     def fontChanged(self, notification):
-        self.reload()
+        if self.isLiveUpdating:
+            self.reload()
 
     def fontBecameCurrent(self, notification):
         font = notification["font"]
@@ -869,10 +878,15 @@ def fontBecameCurrent(self, notification):
     def fontResignCurrent(self, notification):
         self.unsubscribeFont()
 
+    def windowSelectCallback(self, sender):
+        if not self.isLiveUpdating:
+            self.reload()
+
     def windowCloseCallback(self, sender):
         self.unsubscribeFont()
         removeObserver(self, "fontBecameCurrent")
         removeObserver(self, "fontResignCurrent")
+        setExtensionDefault(self.isLiveUpdatingKey, self.w.statusBar.liveUpdating.get())
         super(GlyphBuilderController, self).windowCloseCallback(sender)