text is a tough way to do audio — ⇧ SHIFT — ⌃ CONTROL — ⌥ OPTION — ⌘ COMMAND
Hide/Show All Empty Tracks
Shows or hides Empty Tracks. Empty is not clearly defined.
An audio track with no regions is not an empty track.
An External Instrument track with no regions is not empty.
Duplicating a track creates an empty track.
Duplicate tracks in Logic Pro — Apple Support
You can duplicate a track, creating a new track below the original track with the same instrument and effects settings. The duplicate track is empty, and does not contain any regions.
Select Audio Channel Strips ⇧A
Selects all of the Audio channel strips in the mixer. This does not select hidden channels.
Channel strip types in Logic Pro — Apple Support
Audio channel strips: Used to control the playback and recording of audio signals on audio tracks. All data on the audio track is automatically routed to the audio channel strip assigned in the track list.
Save As Control Bar and Display Defaults
Saves the current control bar and display settings as the default. These settings are saved with a project, so you can revert to these settings by setting the display to default.
Control Bar and Display values can be set differently for every Main Window that is open in any screenset.
Some interesting displays can be created. A tall, narrow window with inspectors and track names?
Customize the Logic Pro control bar — Apple Support
The control bar offers a default set of buttons and other controls, providing commonly used options. In the center of the control bar is the LCD, which shows the playhead position and the project tempo, key, and time signature.
Attach Symbol: Fermata Down
Adds a fermata above the currently selected note in a score.
Logic Pro part box overview — Apple Support
When Show Advanced Tools is selected in the Advanced preferences pane, you can add notes and other symbols from the Part box in the inspector. The Part box contains a complete collection of score symbols, arranged in groups. You can control which symbols are displayed in the Part box, reorder symbol groups, and open the Part box as a separate, floating window.
Copy Section Between Locators (Selection)
Copying a section is clear. The difference between “Selection” and “Global” — the two options for this action — isn’t clear to me yet.
Copying the selection between locators means the selected track or region. Copying global copies everything on all tracks. Subsequent paste commands can be used to see the difference.
Add or remove gaps in a Logic Pro arrangement — Apple Support
Choose Edit > Cut/Insert Time > Copy Section Between Locators (or use the Copy Section Between Locators (Global) key command).