On opening, click on Settings, or if already running a flight, click on Settings arrows at top right.
Click on General tab at top left of Settings screen
Find Lateral Field of View on left
Move slider and revert to flight deck screen to verify effect.
Use hold right click ( or f, r, ->, -<,) to move around flight deck until you can get full ohp in view.
May have to change Later field a few times to get it
Problem you will have is that if full ohp is in view, may not be right to see other instruments in flight, so may then have to use = to zoom in