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Subject: Re: help with double spaces etc.
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Todd Wylie <twylie@watson.wustl.edu> writes:

> For example, I would really like to view text in emacs as
> double-spaced with auto-fill word-wrapping - but to lose the wrapping
> and line returns when saved.

For the double-spacing part you can use the variable `line-spacing', 

,----[ C-h v line-spacing RET ]
| line-spacing's value is nil
| 
| Documentation:
| Additional space to put between lines when displaying a buffer.
| The space is measured in pixels, and put below lines on window systems.
`----

This only changes the display, not the file itself.