Can a button preform multiple actions

Answer 1

Yes.

Answer 2

certainly. I made a button in Java today that allows me to change the time limit on a program I wrote to help my kid with Multiplication.

When I put in the password and a new time limit and hit the button it resets everything, changes the time limit, and writes it to a save file so next time the program is opened the time limit is loaded.

As for having 1 button do different things depending on situation instead of doing a bunch at once, yea you could do that as well.