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is working with: nodebb and the editor offers all you need to insert media and format to get a clear picture.
It may is unclear on first try to post, but you will get in to it very fast!
is also supported directly by type it in the editor:
Mark as solved:
Go to last page of the thread and mark as solved, also more options are there to change the topic.
Mark as a normal topic (not as question)
Only possible after adding the post as a question, thewn you can change ot as a normal topic under Topic Tools on bottom of the post: