Hi Matthew, Here is a modification of the ChimeraExtension.py code I sent earlier that will make the F1 function key switch between stereo and mono viewing. It directly grabs the F1 key presses from the main Chimera window since our current accelerator mechanism is ignoring the function keys. This code still provides the menu entry Tools->Utilities->Stereo/Mono and allows you to add a toolbar button as I described previously. To use this code make a directory in your Chimera distribution chimera/share/Stereo (directory name does not matter) and put the code below in a file ChimeraExtension.py (name does matter). This will add the F1 function key binding and the Tools->Utilities->Stereo/Mono menu entry to toggle modes. Tom ---- ChimeraExtension.py code follows: # ----------------------------------------------------------------------------- # import chimera.extension # ----------------------------------------------------------------------------- # class Stereo_Mono_EMO(chimera.extension.EMO): def name(self): return 'Stereo / Mono' def description(self): return 'Toggle between stereo and mono modes' def categories(self): return ['Utilities'] def icon(self): return None def activate(self): import chimera c = chimera.viewer.camera if c.mode() == 'stereo': c.setMode('mono') else: if not c.setMode('stereo'): from chimera import replyobj replyobj.status('Start chimera with the --stereo command-line switch to enable stereo') # # Chimera camera modes: # 'VRex row stereo', 'cross-eye stereo', 'mono', 'stereo', # 'stereo left eye', 'stereo right eye', 'wall-eye stereo' # # ----------------------------------------------------------------------------- # emo = Stereo_Mono_EMO(__file__) chimera.extension.manager.registerExtension(emo) from chimera.tkgui import app app.bind('<KeyPress-F1>', lambda event, emo=emo: emo.activate()) app.graphics.bind('<KeyPress-F1>', lambda event, emo=emo: emo.activate())