How do you put a picture under your picture like a caption?

On myspace when you go to peoples pictures and you see that they have pictures under there myspace picture how do you do that?How do you put a picture under your picture like a caption?
In Screen Dash you can do this with the photo editing tool called image, it allows you to add images to your photo. Its the only photo editor that can take screenshots, do paint and photo editing, and host images. Thus, you can share images with your friends and family. Its free, easy to use, and provides very professional photo editing.