# Screen('Preferences'

**URL:** <https://psychtoolbox.discourse.group/t/screen-39-preferences-39/1570>\
**Category:** Uncategorized\
**Created:** [March 21, 2006, 4:37pm UTC](https://psychtoolbox.discourse.group/t/screen-39-preferences-39/1570 "2006-03-21T16:37:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dgwakeman](https://avatars.discourse-cdn.com/v4/letter/d/71e660/32.png) [@dgwakeman](https://psychtoolbox.discourse.group/u/dgwakeman)\
**Post date:** [March 21, 2006, 4:37pm UTC](https://psychtoolbox.discourse.group/t/screen-39-preferences-39/1570/1 "2006-03-21T16:37:26Z")

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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