To control the playback of the media file while it is live, first make sure that "Live Playback: Changes are live" is checked. Then use the controls in the preview window to control the playback of the same media file in the live window.
Jean-Pierre Kousz Do you have better wording for some things? Perhaps we can have a look. Start a separate post for improved German localization listing problems with the current wording and the confusion it might create.