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From: Martin Kretzschmar <Martin.Kretzschmar@inf.tu-dresden.de>
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Subject: Re: collapsed thread indicator change?
Date: Wed, 19 Sep 2001 11:47:52 +0200
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Ted Zlatanov <tzz@northernlight.com> writes:

> Martin Kretzschmar <Martin.Kretzschmar@inf.tu-dresden.de> writes:
>
>> (require 'time)  ;; to get an example icon
>> (setq left-margin-width 2)
>> ;; Now C-x b to this buffer! See the new margin.
>> (insert (propertize "Bla" 'display `((margin left-margin) 
>>                                      ,display-time-mail-icon)))
>
> That looks interesting.  The icon only showed up after I switched to
> another buffer and then back to the scratch buffer, though.  I'm not
> sure if that's expected Emacs 21 behavior.

Yes, it's documented that way. Note the comment on the third line.

Just set the margin width before showing the buffer in a window.

I'll try to use that margin for indicating collapsed threads. When I
find something that works, I'll post it.

	Martin