One line, in Configuration.adv.h, ~line 1445. Elapsed time is now shown on status page, along with a progress bar. However it is very convenient to know the exact time remaining for a print, especially if it a long print. I think the line //#define USE_M73_REMAINING_TIME // Use remaining time from M73 command instead of estimation
will do it.
Thanks
Mitch W4OA
Opelika, AL USA