NOTE: this is how i add borders. i'm not very experienced so...yeah. if you have another easier way, teach me. ; ^ ;

1)      Have your poster set—it doesn’t matter what type it is.

2)      Make two new layers.

3)      Take the Bucket Tool and fill your bottom layer with black.

4)      Go to Edit>. Make sure the width is 5px and the color is white. “Inside” should be checked or bubbled or whatever the cheese you call that circle majinger.

5)      Once you click okay, it should have this white border. Get your Magic Wand Tool and click the center. You’ll get a dotted outline—just delete it. Deselect with CTRL+D.

6)      Click your top amazing layer and fill it with white.

7)      Go to Edit> again but this time make the width 1px and the color should be black. Repeat the Magic Wand Tool Process and delete! Don’t forget to deselect.

8)      You should have the black and white border now. You can play with the settings but I use these all the time.