I wonder how it's possible to insert Screenshots in a forum post.
The icon "add an image" exists. When you click you get this:
How does this work actually?
Finally I have found it explained in this article:
https://forum.dokuwiki.org/d/21588-step-by-step-guide-to-insert-images-on-the-forum
Instead of using https://imgur.com, you could take a screenshot with Macecraft's ScreenshotX and share it (click on Share) on https://screenshotx.com
Then you get for example: 
Then replace the "i" with "images" and add the extension "png" to yyf3mm so you get
