Slitherine

Is there any description in the forum how I can I us the "insert image" function in the forum? More detailled: I'm searching
an suitable (free available) publicly accessible web server because the attachement function for posting files is not sufficient
(I want to upload more than three files in a post).

Thank you very much in advance.

I personally just use http://www.imgur.com but there are a lot of free picture hosting services available. Just pick one you prefer. Imgur offer a quite easy interface to upload your file. After you uploaded them it displays a page where you can copy and paste the proper code to insert it into the boards. You can create an account there or upload anonymously.