>If I typed in an equation as display, and the >decide I'd like to turn it to ams align (multiline), >how can I do this without loosing everything I already typed? > >Selecting the equation, then insert/math/ams align is >exactly the way to destroy your work.
Don't select the equation then :). If your cursor is in the equation, then Insert->Math->AMS Align converts your equation type. Better is to use Edit->Math->Change Formula Type->etc. Vincent