If a program freezes or needs to be forcibly quit out of you can use Command + Option + Esc to force quit out of a program. Click on the program you want to quit, choose “Force Quit.” This is NOT how you quit out of an application. Normally you would want to use Command Q to quit a program. This is only if a program is stalled and you can not exit the program the proper way. This may cause issues with the program or your computer so only use it if you must.