This documentation is not using the current rendering mechanism and is probably outdated.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.
- Create a sysfolder, where the notifications will be stored
- Go to extension configuration and input the uid of this sysfolder and the number of notifications, which should be displayed in the top bar inside the TYPO3 backend
- In the extension configuration you have the possibilty to force, that a popup will be shown, after the user logs into the backend, if he has unread notifications