Sample won't stop

So I copied one of the existing samplers (like a C&G web tutorial told me to do) and I popped my own sample in there. For now it’s super long (3 mins) so it’s more of a track. That being said, I can’t seem to get it to turn off when I hit the button again. Is there a way to edit this? RIght now the button just starts the “sample” over. Newbie here, so sorry for the basic questions.

I’ll likely have several more!!