Screen('Preferences'

Hi,

I would like to know is there a way to run the tests without the big warning symbol coming
up at the beginning? It is not good to have this very bold stimulus preceding your actual
stimuli, but I would like to have the waitblanking data etc. I know that
Screen('Preferences', 'SkipSyncTests',1) works, but then the tests aren't run. Thank you for
your help.
Dan