411 REFERENCE · Wikibooks
MATLAB Programming/Psychtoolbox/Screen Commands/UsageWarnings
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Usage:
[oldMore,oldSeverity,oldAlready]=Screen('UsageWarnings',[more],[severity],[already])
Control how usage warnings are handled.
severity can be 0(suppress),1(warn), 2(error).