Hey, thanks for your help guys. The problem is I want to make a door with a button to open and close it, I want the door to go back down and back up. When i try it ingame, the button only makes the door go backwards, instead of down and up. For the func_door, all I enable is its name, and transparency. For the func_button, I enable the target which is the name of the func_door, the Toggle flag, the Dont Move flag, the Sound tab, and the Delay before reset tab. How can I make the button make my door move up and down?

Go to the func_door's properties, next to the small black circle you will see a drop-down (underneath Angles). If the door starts open, select Down and if the door starts closed, select Up from the drop-down menu.

Under yaw? If so, then I already have done it before, but it still doesnt go down, it goes backwards. Where do i select down?

Yes, under Yaw. Double check your settings. That's the only setting the entity needs to move vertically.
Post a screenshot with the entity's properties.