From b2evolution manual
This manual page is outdated. NEW PAGE: Adding content in b2evolution v5+.
In order to add content to your site you first need to log in, then click the "Write" option in the menu bar at the top of the page. Alternatively (and in b2evo < version 2.x), you can also use the Browse/Edit/Posts/Comments Tab in the backoffice and click on "New Post" from there. In both cases you will be taken to the Write screen