How do you put more than on picture on windows paint?

I know how to put one picture on but when ever I try to open an other one (by pressing open and then selecting my picture) it says save changes to the picture name. How can I get two or more pictures from my pictures? Is this even possible?How do you put more than on picture on windows paint?
I dont think Paint.net can handle more than one picture at once. Try using something else like photoshop or if you don't want to spend any money, Gimp.How do you put more than on picture on windows paint?
don't use ms paint, rather use paint.net