]Can you be more specific regarding the outcome you are trying to accomplish?
The vent window frame has 3 specific adjustment points:
1. At the front (top) of the door there is a bolt that mounts through a slot in the door that allows for a little up and down movement.
2. About 6 inches below that bolt on the front of the door there is an adjustment bolt that allows you to tip the frame front to back.
3. At the base of the door accessible from underneath there is another adjustment bolt that allows you to move the foot of the frame slightly in out and back and forth.
4. there is a pinch block located just under the vent window accessible from a little plug located about 2 inches from the top of the door to the right of the side glass channel. this needs to be loosened to make adjustments.
I found it easiest to remove the door card to access the inside of the door.
A. roll the window up to it's stop.
B. loosen the pinch block
now start working the adjustment points referenced earlier.
One lass thing to keep in mind is that what ever you do to the vent frame is going to impact the side glass so you'll need to be ready to tweak the adjustments for the side glass guide located at the back of the door by the latch.
I hope this helps.