view timecode in source window?

i seem to have lost the ability to view source timecode overlay in the source window? (i'm working on the edit page)
i've turned on data burn in (in workspace), and it's fine, showing me anything i want in the recorder window, but i can't bring it up in the source viewer when viewing clips.
have i, in yet another senior moment, done something amiss?
tia
i've turned on data burn in (in workspace), and it's fine, showing me anything i want in the recorder window, but i can't bring it up in the source viewer when viewing clips.
have i, in yet another senior moment, done something amiss?
tia