How to only change stimuli background color to white?

hi guys ,

I have a problem that is how to only change the stimuli background color to white.

looked others question ansser that I can change all the programs background color to white .
but I just only want to chang stimuli’s background !

Is that need write code ?

Please help me !!!

thanks

Hi, can you provide more information on what do you mean by changing a stimuli’s background to white (e.g. what type of stimuli - a pre-made image?)

ok i will show the pic

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