However you may decide to use your sliding glass door as a regular entry point in which case you might want to think about installing a key lock so the door can be unlocked from the outside.
How to change sliding door lock.
These are the parts used.
Key lock and housing product code.
Insert the back of the lock into the opening on the exterior side of the patio door.
How to change an old mortise lock handle patio door with new 2019 parts.
They are not used as entry doors.
You have to remove the handles to see how the small actuator lever enters the latch.
Your lock is most likely the e2014 or the e2013 shown on my sliding door lock page.
Usually its the e2014 but the only way to be absolutely sure is to loosen the two screws that hold the handle on.
Sliding glass doors are typically only lockable from the inside.
Then replace the bottom screw in the hole where it was affixed to the handle to prevent the latch from falling into the doorframe.
Remove the handles from the door using a philips head screwdriver.
In this video we show you how to install a key lock set on an existing patio door handle.
Hold the two pieces in place while tightening the screws.
On the e2014 the actuator lever is at an angle of 45 degrees.
Insert the new lock piece with the screw holes and locking mechanism into the opening on the interior side of the patio door.
Step 3 removing the screws two screws on the end of the door secure the latch.