Tire deflation menu?

So i was playing the game when i accidently pressed a button or a series of buttons that opened up a menu in which you could deflate all tires,release all hinges,and remove all connection beams. It was really cool but I can't seem to find what button does it, its not in the control files or anything either (or at least that i can find). If anyone knows and could help me that would be amazing. Sorry if i'm being stupid and cant find it... its probably really obvious.

 

The bracket buttons.

 

Yeah, its the bracket buttons. You can also add other things to the UI by clicking on the little + symbol at the bottom right of the screen in game.

 

okay.. im looking for this also.. what are the bracket buttons?

 

'[' and ']', above and to the left of the 'enter' key of a standard US layout keyboard.