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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: display value of links in mini-buffer (was: Re: bug archiving
 policy)
Date: Sun, 06 Dec 2020 13:44:01 +0200
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To: Yuri Khan <yuri.v.khan@gmail.com>
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 (message from Yuri Khan on Sun, 6 Dec 2020 17:54:40 +0700)
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> From: Yuri Khan <yuri.v.khan@gmail.com>
> Date: Sun, 6 Dec 2020 17:54:40 +0700
> Cc: Emacs-Devel List <emacs-devel@gnu.org>
> 
> However, some modes also put 'help-echo property over text in a
> buffer: buttons and links in Customize, links in Info, links in Eww,
> diagnostics in Flymake. All of them would benefit from the behavior
> you’re asking of Org: display tooltip text in the echo area when point
> enters text so propertized.

That could be annoying in some modes that have a lot of these
help-echo properties.  For example, in Dired you will see a lot of
traffic in the echo-area if the help-echo text at point will be
displayed there, because point generally moves there between file
names, each of which has a help-echo on it.

So maybe "reusing" help-echo that way is not the best alternative.