Great question. I'll let the Main Program Window --> Navigation section of the MediaLab manual do the talking for me:
When test-running an experiment, you may want to skip over various items, files, or questionnaires that you already know are working. You also may have timed items that you don't want to wait for while you're testing things out. For this reason, there a few secret key combinations that will allow you skip around.All use the right or left arrow keys on your keyboard in combination with either or both of the Alt key or Ctrl key. Press each key down and hold it until each of the remaining key(s) is pressed.
Ctrl + Left Arrow > Go back to previous question in a questionnaire
Ctrl + Right Arrow > Skips to next question in a questionnaire
Shift + Alt + Right Arrow > Quits the questionnaire or other current file
Ctrl + Alt + Right Arrow > Quits the experiment in progress
I hope this helps. Please let us know if you have any other questions. We're here to help!
Jason Reed
Empirisoft Software Support Specialist