Resizing new windows using Python callbacks
This visitrc file resizes all new windows, created via the AddWindow command, to 1024x768 pixels. If you do not like VisIt's default 1:1 aspect ratio for new vis windows, installing a Python callback such as this one could be helpful.
def onAddWindow():
UndoView() # Something to force a sync so state we get is valid
ga = GetGlobalAttributes()
ResizeWindow(ga.windows[ga.activeWindow], 1024, 768)
RegisterCallback("AddWindowRPC", onAddWindow)