bug#20540: 25.0.50; Document tooltip woes, including `help-echo'

[Lars Ingebrigtsen]

Drew Adams <drew.adams@oracle.com> writes:

> 4. `help-echo': No doc saying whether the string can be propertized, and
> if so, which properties have any effect.  Although `x-show-tip' seems to
> let you change the char size, color, background color, etc., and you can
> use property `display' with `help-echo', apparently you cannot change
> the face attributes of the `help-echo' string so that the appearance
> changes.  This is quite a limitation, AFAICT.

This was apparently fixed in:

commit 4a112fd7a6f0dcbd1b99b811b324123f5699bdfb
Author:     Stefan Kangas <stefan@marxist.se>
AuthorDate: Mon Mar 8 03:29:42 2021 +0100

Some of the other documentation things discussed in this bug report
should then be OK (since it now works), and the tooltip frame parameter
stuff was (if I'm skimming this thread correctly) working as supposed.
So I'm closing this bug report.  If there's more to be done in this
area, please open a new bug report with those specifics.

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