Open the door you wish to adjust and locate the screw as shown in the photo. (Click or tap for a larger view)
Grab your screwdriver, and turn that screw CLOCKWISE a half turn to a whole turn. This will pull the door in.
If necessary, do the same for the second hinge on the door.
Close the door, and check for flushness between face of door and face of front frame. They should be the same. If not, open the door and adjust further. If you adjust too far, simply turn the screw counter-clockwise. Close the door and re-check. Once you are satisfied with the adjustment, you’re done!