Opening a Powershot Pro staple gun is a simple process that can be completed in a few steps. First, locate the release latch on the back of the staple gun. This latch is typically a small, black button or lever. Once you have located the release latch, press it down and pull the top of the staple gun up and away from the bottom. This will open the staple gun and allow you to access the staples inside.
Once you have opened the staple gun, you can insert a new strip of staples into the magazine. To do this, simply align the staples with the magazine guides and push them into place. Once the staples are in place, you can close the staple gun by pushing the top and bottom pieces back together until they click into place.