How to apply a mask (disappearing stimuli) in OpenSesame
I am a new user on OpenSesame. I need help figuring how to apply a mask in the sketchpad.
I found this tutorial but it doesn't help because I can't seem to find the mask icon that they refer to. https://osdoc.cogsci.nl/2.8.3/tutorials/aps-tutorial/#step-4-design-the-fixation-target-and-mask-sketchpads
What I want to do is show a word and shape for 2000ms and after the first 250ms I want the shape to disappear and the word to remain. I was hoping to accomplish this by adding a mask so that I can record when participants press any key.
Please help. Any and all feedback is greatly appreciated.