Where, oh where, is the VR zoom in button.

[SIA_Target]

 Sooo many view buttons, so much confusion (on my part). Can someone pinpoint the zoom button I should be using with VR? The type that returns to default after it's released. That would be for in the cockpit, which one I tried, IIRC, but nothing happened. I'm trying to assign it to a VKB Gunfighter, if that matters.

 So I can do my own fishing in the future, is there any literature on what all the buttons do and which ones pertain to my application? TIA

[Baldrick33]

It is in the UI Layer control section, there are two levels which can be bound - VR zoom and Spyglass VR Zoom

[SIA_Target]

Looked everywhere but there, thanks.