How to Adjust a Sliding Glass Door – Home Repair Tutor Sep 15, 2012 · Step 3: How to Adjust Sliding Glass Door Rollers for a Smoother Ride. Inside a standard sliding glass door there are adjustable rollers that help it slide back and forth on the track. There are holes on your sliding glass door that conceal the adjusting screws to these rollers. On my door the holes had plastic plugs in them.