I wanted to use diatonic numerics to program a lead sheet but I could not find any BIAB documentation on it.

I went to chat line and asked the question:
"Quick question. I have biab 2022. Can I progran a song with it's diatonic numbers, i.e. I - IV- V or ii-V-I?."
They responded with:
"Under Display Options | Layers, you can select Roman Numerals."

After hunting around, I found it as an icon under VIEWS. Is this the only way to access LAYERS function? Normally there are several ways to get to a function. Also, nothing shows up in help when I search for Chord Display, Is there documentation somewhere?