On my door the holes had plastic plugs in them.
Adjust sliding glass door.
If it s too low use a flat pry bar to raise the door while you turn the adjusting screw clockwise.
Be sure to wipe up any excess that gets on the floor it can make the floor very slippery adjusting the height.
On the bottom portion of your sliding glass door you should see a small hole on each side of the door.
They may be covered by plug covers.
These holes hide the adjustment screw for the coordinating rollers.
There are holes on your sliding glass door that conceal the adjusting screws to these rollers.
First locate the screws on the bottom of your sliding glass doors.
Spray the entire sliding glass door track with a silicone based lubricant to ensure your door glides smoothly.
How to adjust sliding glass door rollers for a smoother ride.
Regular vacuuming of the track will help keep the door sliding smoothly.
Inside a standard sliding glass door there are adjustable rollers that help it slide back and forth on the track.
Most sliding glass doors contain two sets of rollers one on each side of the bottom of the door.
How to adjust sliding glass doors.