Most sliding glass doors contain two sets of rollers one on each side of the bottom of the door.
Sliding glass closet doors adjust height.
Sliding doors slide best when a uniform gap is maintained along the edges and bottom of the door.
Then set the bottom of the door into the runner on the bottom track.
Open your door approximately six inches and watch the gap between the door and frame turn the adjustment screws with your screwdriver until a uniform gap is achieved.
Adjusting the height first locate the screws on the bottom of your sliding glass doors.
Pick up one door panel with the outside facing you tilt the top back and slip it into the top track.
You can alter the height of these rollers by accessing the adjustment screws which are set into slots on the door s outer edges perpendicular with the rollers themselves.
They may be covered by plug covers if your screws are covered by plug covers use a putty knife to remove them.
Repeat this step for the front door.