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.<p>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.<p>Docs: <a href="http://www.gnu.org/software/libtool/manual/emacs/Follow-Mode.html" rel="nofollow">http://www.gnu.org/software/libtool/manual/emacs/Follow-Mode...</a> .