Add a little icon, similar to the 'this slide has a slide transition', to the slide thumbnails in the Impress slidesorter.
Thusly, users can visually discern slides that show differently initially than in edit view.
Relevant code: PageObjectPainter::PaintTransitionEffect() in sd/source/ui/slidesorter/view/SlsPageObjectPainter.cxx, just reuse that for the custom animation, and put it at the opposite side of the thumbnail.
Instead of getTransitionType(), call getMainSequence() on the page.
Ciorba Edmond committed a patch related to this issue.
It has been pushed to "master":
fdo#65456 - Provide visual clues in slidesorter for custom animation.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.
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