Mark, BIAB added this option many years ago.

I believe a dim chord is by definition a dim5 (and a flatted 5 at that). Here's the thing: I have never seen 'dim5' anywhere outside of BIAB.

If you want a dim7, you have to write dim7. So in my opinion the correct way to set it in BIAB display settings is to say dim=dim5. It looks like you agree.

BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors