Apple Logic Express 9 - Manual (Page 149)

This locks (fixes) the SMPTE position of markers. To indicate this status, a lock symbol is
displayed at the beginning of the marker name.
These markers always retain their absolute time position: if the project tempo is changed,
the bar positions will change to keep the markers at the same SMPTE positions.
Tip: You can also lock/unlock the SMPTE positions of markers from the Arrange area’s
Region menu, and the Functions menu of the Piano Roll Editor and Hyper Editor, if you
enable the display of global tracks.
To unprotect the position of selected markers
µ
Choose Options > Unlock SMPTE Position in the Marker List (or use the corresponding
key command).
Note: You cannot unlock the SMPTE position of scene markers. See Working with Movie
Scene Markers .
To change the length of a marker
µ
In the Marker track: Place the pointer over the marker border. When the pointer changes
to a Resize pointer, drag the marker border to the new position.
µ
In the Marker List: Use the mouse as a slider on the bar Position display, or double-click
a position value and enter the new value with the computer keyboard.
The marker border can also be the beginning of the subsequent marker, especially if the
length of the second marker hasn’t been defined. Markers cannot overlap.
149 Chapter 6 Working with Markers