Somehow accidentally hid the To/From/Subject line headers on individual messages.
In trying to change some individual display settings, I somehow managed to turn off the header for the To/From/Subject line fields on emails when you open them in a new window. It only affects emails you open from the inbox to read in a new window. Hitting forward or reply or opening a new message to compose still works.
I am honestly not sure what this section is called, which is presumably why I can't figure out how to un-hide it.
Thanks!
Modificado por ecg_FP a