Sliding doors are very heavy very breakable and very expensive this is a two person job.
Slide the door open.
Please slide the door to let some fresh air in.
Which made me wonder if open is the verb and slide is the adverb.
But that last one seems a bit peculiar.
Please slide the door closed.
Slide open door would be the imperative voice probably used here to be short and clear.
Never leave the glass door unattended.
It seems like i am trying to say.
Please slide the door open.
Then lift the door up and out of the track laying it down carefully across two sawhorses.