It seems like i am trying to say.
Slide the door open.
Please slide the door closed.
First slide open the door completely and remove the head stop.
Which made me wonder if open is the verb and slide is the adverb.
Please slide the door open.
Please open the door to let some fresh air in.
But that last one seems a bit peculiar.
Slide open door would be the imperative voice probably used here to be short and clear.
Then lift the door up and out of the track laying it down carefully across two sawhorses.
Sliding doors are very heavy very breakable and very expensive this is a two person job.