I follow your first sentence, but your second sentence confused me. Can you explain:
"If there is something you want to show during the trial as a result of doing nothing, you can define -1 as a valid response for the stimulus with the jump functions and then put the rest of the things you want to show in the same trial as the -1 response."
-1 is currently listed as an rt. Is that what you mean by define it as a valid response?
Essentially I want to show things based on whether they hit Z, /, or time out. Jumping from Z and / is easy, but it seems like you're saying I can jump from a -1?