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.
Sliding glass closet doors adjust height.
Pick up one door panel with the outside facing you tilt the top back and slip it into the top track.
Repeat this step for the front door.
Then set the bottom of the door into the runner on the bottom track.
Make sure to adjust the wheel assemblies on the doors verifying that 1 inch of the roller is showing.
Most sliding glass doors contain two sets of rollers one on each side of the bottom of the door.
Usually it is simply a matter of inserting a screwdriver into the hole at the bottom of the door locating the adjusting screw and tightening or loosening it depending on whether or not you want to raise the door or lower the door.
Locate the adjustment screws on the lower edges of the door.
They may be covered by plug covers if your screws are covered by plug covers use a putty knife to remove them.