If you are using Photoshop, then you can also apply boarders by following the directions below:
Step 1: Create a new layer
(Shit+Ctrl+N) Step 2: Select All
(Ctrl+A) Step 3: Select --> Modify --> Border
Step 4: Enter the Amount of Pixels you want
(Pixels = Thickness of Border) and hit OK
Step 5: Edit --> Fill
(Shift+F5) Step 6: Choose what color/style you want and the amount of Opacity
(how dark the border will be)
*By creating the border on a new layer, you can adjust it in the future without ruining the original images below.
