Hello Guys! 
I’m new of this forum and I hope that you can help me understanding this amazing software!
I was watching the “Getting Started” video tutorials series regarding the UI Interface. In the meanwhile I came across a button called “colorize” in Preferences>Interface>UI. Maybe it’s a function that is of little importance but I just wanted to know how it works because when I click it nothing happens.
Thank you in advance! 
hold down control while hovering over the button for the tool tip.
I see it, but I still don’t understaind, anyway doesn’t matter, sooner or later I will understand how it works. Thank you for your tip anyway