Multiple Button Presses

[new_horizon]

Hi all,

I'm nearing the final part of programming my latest experiment, whereby individuals see some motion within a scene and are then asked to indicate where the motion occurred (by clicking in up to three zones).

Does anyone know how program multiple button presses? So that someone could for example select 1,2 and 3 or just 2 and 3 before pressing a "proceed" button that I have selected which will start the next trial?

Thanks