XEDIT is a combination full-screen and command-line editor
yet without mode switching. There is no "insert mode" in the
VI sense. (There *are* two insert modes: one on your 3270 terminal
or emulator, and another for entering lots of lines of text
that is more properly called inPUT mode.)
Unless turned off, XEDIT always has a command line.
Unless turned off, XEDIT also has a "prefix area" for operating
on specific lines; very handy! Then combined with this,
whatever you type-in into the visible part of the file is
taken directly as a replacement for whatever was there before.
Now ... I'm trying to answer your question:
> 2. Is there some sort of "Xedit for dummies" or "Xedit for the vi user"?
> Is there a one page cheat sheet?
>From the XEDIT command line, enter "help" (sans the quotes).
> 1. Is there an xedit for Linux? You get bonus points if it is open source.
Gimme the bonus! It is open source.
What you want is THE, The Hessling Editor.
I don't use it heavily, but did enough to find that
my personal XEDIT profile can be made to work equally well with
1) traditional XEDIT (for CMS files)
2) XEDIT against OpenVM files
3) as my THE profile
-- RMT