In View -- Text Editing, "Show Line Numbers" is grayed out

This is while in the text editing window, so I’m not sure why this is grayed out or how to get this function to work.

I’m on a 2018 Mac Mini running Mac OS Big Sur 11.2.3 and Scrivener version 3.2.2 (14632)

Thanks for the help!

Are you in Page View mode? If so, the feature doesn’t work. Check A.6 in the manual.