How do I put at Santa hat on my cat in a photo on my computer?

hoganenvy: How do I put at Santa hat on my cat in a photo on my computer?
How can I add a Santa hat on my cat’s head in a picture on my computer? I would like to do this for a Christmas card, but paint will only let me cut out a square. I need to be able to trace around the hat. Thanks.

Answers and Views:

Answer by Hugh
You need a program that will handle layers.
Paint.net
https://www.getpaint.net/
The Gimp
https://www.gimp.org/