Hi and welcome to the forums!
As usual in PS, there are even several ways.
If the robot-program does not define it, the robot will use the tool assigned to the robot-operation.
If the tool needs to be dropped, use detach/attach-events on your operation.
The better way is to control this in the robot-program. There are mount/unmount commands available, that will not appear later in the downloaded program.
Thanks for the quick answer. I'm new to the program (using it for school).
I'm feeling a little overwhelmed by RobotExperty, but i'll figure it out.