Apple Logic Pro 8 - Manual (Page 683)

Chapter 33 Working With Notation 683
Dynamic Symbols
These symbols can be inserted at any position in the score. They are purely graphic
symbols, and have no effect on the playback of regions they are placed in.
Note Heads
If you drag one of these symbols onto a note, the note head changes to that of the
selected symbol. If multiple notes are selected, dragging the note head onto any one of
the notes will attach it to all notes in the selection. Altered note heads do not affect
MIDI playback.
If you want to return an altered note head to a standard display, use the same method,
with the black, round note head selected.
Invisible Note Heads
Use of the gray note head will make a note’s head, and associated ties, invisible. This
note is displayed with a gray note head onscreen, allowing further edits. Nothing but
the stem will be visible in the printout.
Invisible note head