Set shims on the bottom of the entryway in the shower where the pivot door will hang.
Rest the pivot door directly on top of the shims. It should have approximately 1/4 to 1/2 inch of clearance or more.
Line up the predrilled holes in the pivot door with the holes in the hinges installed on the shower enclosure.
Fasten the pivot door to the hinges using stainless steel screws and a screw gun.
Remove the shims, and swing the pivot door open and closed on the shower to finish hanging the shower door.