The Discourse forum software often gets new features. I’ll try to keep you up to date on new things you can do.
This one isn’t something that would be regularly used on this forum, but you can now add images in a grid rather than just as individual images in a vertical column. Add an image grid using:
[grid]Images go in here[/grid]
For example…
You can find more information about image grids here… Introducing image grids in posts - Announcements - Discourse Meta