I cannot move the jetways upwards

[windshear]

I can use the Q and Z keys to move the animated ground staff who waves in the aircraft, but the gate I cannot move up... https://imgur.com/a/3P7HW7x

[virtuali]

As you can see from the diagram at page 42 of the GSX manual, the Q/Z keys in jetway editing mode control the jetway logo.

This thread here, instead, explains why it's not possible to change the jetway height:

http://www.fsdreamteam.com/forum/index.php/topic,18161.msg128163.html#msg128163