UI Appear on Mouse Click

How would I make GUI or UI appear if I right click to cover the screen and then remove when right clicked again? sorry i’m newish to unity and it might not make sense but like a zoom or scope in script in C# thanks :smiley:

Something like this?

Or Zooming in with a gun, Halo style. - Unity Answers ?

Or how do you zoom with a sniper? - Unity Answers ?