Adjust sliding glass door lock handle is using a putty knife remove the strike plate to access the adjustment screw.
Sliding door lock adjustment.
This video will show you how to properly adjust the lock and handle on your milgard sliding glass door.
Now you will be able to move the strike plate up and down.
If a patio door is difficult to operate won t lock properly or is loose or drafty make adjustments to the roller latch or strike to fix the issue.
Using your phillip s screwdriver you need to back out the adjustment screw and the screws located above and below the adjustment screw.
Inside a standard sliding glass door there are adjustable rollers that help it slide back and forth on the track.
On my door the holes had plastic plugs in them.
How to adjust a pella sliding door latch.
How to adjust sliding glass door rollers for a smoother ride.
Your pella sliding door has a built in latching mechanism that extends into the lock strike when you place the latch in the locked position.