Zoom Vertical Out    ⌘↑

Reduce the vertical size of the display. In the Score Editor the entire page shrinks. In the Arrange window track/region height is reduced.

On the X-Touch press the “cursor” key (center of the direction arrows) and use the up-arrow.

None of the documentation describes the result of the action very well. Experimentation is the way here.

Scroll and zoom the Logic Pro Tracks area — Apple Support

In Logic Pro, drag the horizontal and vertical zoom sliders in the Tracks area menu bar. Drag the horizontal slider left to zoom out for a wider view, or drag it right to zoom in for a close-up view. Drag the vertical slider up for a wider view (more tracks), or drag it down for a close-up view (fewer tracks).

  Select Project 18

Nope — I won’t have 18 projects open. Common wisdom is that having more than one project open at a time can lead to project corruption.

This could be a holdover from the early versions of Logic where projects were called “songs”, and people using Logic for playback in peformances would have many songs open, strictly for playback.

The current world has MainStage for playback purposes. A far better tool for backing tracks or, possibly, programmatic audio.

There is no documentation in user manuals for Logic 7, 8, 9, or 10.

  Go to Marker Number 19 𝍖⌃9

Markers are useful. Markers with descriptions or names even more so. Marker 19? Not sure I will use commands to jump to numbered markers.

Navigate using markers in Logic Pro — Apple Support

You can navigate through your project using markers. This is useful when you want to quickly jump to, and edit, regions or events at a specific position in your project, for example

  Independent Grace

Makes a note on the score an independent grace note. When scoring music we don’t worry about the actual performance — that’s the job of the musician. When an automaton interprets a score it needs to know the rules for performance.

Make the rules clear so the music can playback in the expected manner.

Use independent notes in the Logic Pro Score Editor — Apple Support

Independent Grace: The note is displayed as a single (independent) grace note.

  Slip Left by Nudge Value    ⌃⌥←

Interesting ways to move things in the regions. I would compare it to a slide rule movement. Slipping shouldn’t be confused with rotating, which is also possible.

Move regions in the Logic Pro Tracks area — Apple Support

You can slip regions, which moves the content of the region left or right by the nudge value without moving the boundaries of the region. The content effectively moves inside the region, which remains stationary. Slipping a region is possible only when the source content exceeds the length of the region by the amount you slip (or greater).