Emacs follow-mode
I've been using Emacs for 32 years (hard to believe) and never knew about this incredible but apparently obscure feature of Emacs.On my 27" cinema display, even using 12pt Monaco for my tired old eyes for extreme legibility, I can get 4-5 columns of 90 lines each, when editing source files or text, for an effective "screen length" of 360-450 lines. With 10pt, you can get 500+ lines "on screen" easily.Docs: http://www.gnu.org/software/libtool/manual/emacs/Follow-Mode... .