I want to share my problems with the GSX 2 "push back edit" & "Chase Plane" and how I solved it.
First of all I must say, that I deleted long ago all key commands in P3DV4 and in any airplanes like PMDG to avoid
any conflicts. So I delete also any "Slew" commands, wich are needed to manage the "push back edit".
If you also deleted the key commands you have to change them in Options - Controls - Key Assignments - Slew
Slew (up quickly F4
Slew (down quickly) F1
Slew (freeze Pitch) F6
Slew (Pitch up quickly) F5
Slew (move forward) Num 8
Slew (move backward) Num 2
Slew (move left) Num 4
Slew (move right) Num 6
Slew (rotate left) Num 1
Slew (rotate right) Num 3
Slew (bank right) Num 9
Slew (bank left) Num 7
Slew Toggle Y
Important is to diable "Chaseplane" before P3D Start!
I use Simstarter NG and I made an special exe.xml Setting without Chaseplane, where I disable it. When I have finished the Pushback editor, I restart Chaseplane manually.
The next thing is the top-down view of the push back editor, with chaseplane active I suddenly saw the whole world and I was unable to zoom in.
There is a Custom view (Views - Change view - Custom view - TOP - FSDT Editor Camera) where you got a reasonable top-down view of the airport.
This is also mentioned in the Manuel, but may be you don't like reeding manuals, like myself...
I hope this my help some on, it took me some hours to find out..
Greetings Erik