How to adjust a patio door

Got a new sliding patio door put in about 3 years ago ,only noticed that it doesn't appear to be lining up perfect with the frame. It engages the lock perfectly but on the other side of the door is letting in a draft where it mates to static window .The sliding patio door moves on a rail. Is there anyway to adjust how the patio door sits on the rail ? .

There are 2 holes at the bottom of the door facing the frame. Insert a screwdriver in one of the holes and turn clockwise or anti clockwise as appropriate. This will adjust the height of the wheels