Folding

a feature of some Text Editor-s - almost like OutLining, but not quite.

folding EMacs http://mdemarco.web.wesleyan.edu/latex/folding.html

folding VIM http://vim.sourceforge.net/htmldoc/fold.html

FED http://www.talula.demon.co.uk/fed/

FTE http://fte.sourceforge.net/

Ripple http://www.cs.ukc.ac.uk/people/rpg/tsl2/ripple/

LEO is a full OutLining tool that is intended to be a code editor as well.

Sci T E <http://www.scintilla.org/Sci T E.html>

• X11 version for MacOs X http://homepage.mac.com/atl/tex/#other