This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Creating backend layouts¶
For someone whose not familiar with the syntax the wizard can still be used. Simply create a backend layout record, use the wizard button next to the field for the definition and create the structures, set the column numbers and title as you like. Save en close the wizard. Instead of saving the record you can now copy the layout configuration and paste it into a file in the sitepackage.
Add the title to the language file, create a nice icon and that's it.