Musicians with skills get points via the point system of Jammify. It's a fair way to mesure if a Jammify user knows what he's doing. For musicians that don't want every one to randomly join your sessions you can setup a minimum points required for adding a timeline.
The minimum required points cannot be set higher then your own points.
Simply enter the field displayed on the right, this field can be found in the "new session" and "edit session" page.