>Psychtoolbox>PsychOneliners

Backup current clut gamma tables of screens for later restoration via RestoreCluts().

Usage:

BackupCluts([screenIds=all]);

Saves all cluts/gamma tables of all connected display screens by default,
or of specified vector ‘screenIds’ to a global variable. The cluts can be
restored from this backup copy by simply calling “RestoreCluts”. This is
also done automatically if “sca” is executed at the end of a session.