-d command-string → run the command string at startup.
-g png-filename → save an image file.
-J → change to the user's home directory on startup (if possible).
-k → suppress reading of “.pymolrc” and related files at startup.
-l python-program-filename → launch the Python program provided in its own thread.
-q → suppress the startup message.
-Q → suppress the startup message and subsequent text output.
-r script-filename → run the Python program provided in the __main__ Python namespace.