Open the Marker List, select the scene marker, then choose Edit > Cut or Edit > Delete from the Marker List Edit menu (or use the corresponding key commands).
In Logic Pro, do one of the following:
Choose Remove All Scene Markers from the Navigate > Other > Remove Movie Scene Markers submenu.
Note: This command does not remove the marker set; only the markers in the set.
Open the Marker pop-up menu in the global Marker track header, then choose Marker Sets > Delete Set.
Open the Marker List, then choose Marker Sets > Delete Set in the Marker Set pop-up menu.
In Logic Pro, open the Marker List, select the scene marker, then choose Options > Convert to Standard Marker.
In Logic Pro, select the marker in the Marker List, then choose Options > Convert to Scene Marker.
Download the guides:
Logic Pro User Guide: PDF