Readible Letter Across Entire Game

[Kamileon]

Hey guys, I currently have an inventory item in the form of a letter (iLetter). I want to design it so that when the player uses the iLetter on cBuck (the player) then a zoomed in and more detailed sprite of the letter appears. The player should be able to exit the letter by left-clicking. The player should be able to do this in every room he enters.
Is there a way to code this correctly?

[Eastwing]

Create a GUI, set it's BorderColor and BackgroundColor to 0 (transparent) and then set picture of your letter as BackgroundImage.

All you need to do after that is write closing of GUI by left-click and it's showng by using item