[UML]Looking for Use Case Diagram for any program

Hi!

Is there on BHW any software engineer, who would be so nice and share any UML Use Case Diagram for any program (not to be big and complicated).

I'm just looking for any proper, correct in 100% and professional example, so I could understand how to perform such diagrams on my own.

It could be diagram for any software Paint, Notepad, Solitare, Pong Game - ANYTHING.

I'll be very grateful for any help

I've started using these within the past month are so.. they can be pretty useful but can also waste a lot of time, especially when you're new to using them. One of the keys, I think, is to not put too much info into them so as to leave leniency for the programmer..

pm if you want and I can show you one of my recent ones.. not saying it is the most professional example but has been working well for me in planning out projects.. also, I had been using Enterprise Architect but am considering switching to another software since this has some things I find annoying.