This at the beginning of this page

%%commentbox
Commentbox at the top right of the page

__see also__\\
[DontCreateMe]
%%

produces the commentbox at the top right of this page.

This in the middle of the text

%%commentbox
Commentbox in the middle of the page

__see also__\\
[DontCreateMe]
%%

shows a comment somewhere at the right side.

The positioning of the comment box is based on the settings of the "commentbox" style found in jspwiki.css (i.e., the CSS stylesheet used by JSPWiki). By default it is set float:right, which simply positions the comment box at the right hand margin of where it shows up on the page.

commentboxes new for v2.1.115-alpha!?!

No, they are just a useful side feature of CSSInWikipages. The default jspwiki.css defines, as an example, the commentbox style. --JanneJalkanen