Select All Lanes

Selects all of the lanes in the Step Editor.

Edit lane parameters in Logic Pro — Apple Support

You can copy, delete, reorganize, and convert lanes and their associated parameters when creating Lane Sets.

Logic Pro Step Editor Overview — Apple Support

The Step Editor is a graphical editor that can be used to create or edit MIDI note and controller data. You can use the Step Editor to view and edit different MIDI event types, shown as vertical beams—or steps—along a timeline within a region.

  MIDI In Toggle ⌥I

Enable/disable step input recording from MIDI devices. When MIDI Input is “on” the MIDI In indicator turns red. The MIDI In and MIDI Out indicators are found at the top of the Event List, and at the top of the Piano Roll Editor

Overview of the Piano Roll Editor in Logic Pro — Apple Support

You can record notes into the Piano Roll Editor directly when the MIDI In button is activated using step recording techniques. See Use step input recording. Make sure the MIDI Out button is activated so that you can hear notes that you add, select, or click.

Use step input recording in Logic Pro — Apple Support

In Logic Pro, inserting notes with a MIDI keyboard is similar to using the Step Input keyboard. However, you press keys on your real-world MIDI keyboard, rather than clicking onscreen keyboard notes.

  Quantize 1/8 Swing D

Quantize the MIDI playback of the selected region.

Logic Pro Quantize parameter values — Apple Support

Swing quantization: The 1/16 Swing A-F settings delay the position of every second point in the quantization grid by a fixed percentage. You can also manually alter the swing factor of any Quantize value.

Swing D
62%

  Select And Operate using Transform User Preset 11

It’s good that there are up to 30 preset transforms. Unfortunately there is no way to see what, exactly, Transform User Preset 11 *is*.

It’s like trying to program with numbered subroutines or functions.

Far safer and more meaningful to “Open MIDI Transform ⌘9′ and select the transformation there. I guess some people can keep it straight between Group 27 and Transform Preset 27 — not me.

Oh, yeah, this is exactly the tool I was looking for back in the 1990s when I was programming MIDI “orchestras”.

Use MIDI transform sets in Logic Pro — Apple Support

Depending on your needs, it may be worthwhile to create your own transform sets. These can be configured and saved as part of a project. (Doing this in your template projects makes your transform sets available in all projects.) Your transform sets are shown at the bottom of the Presets pop-up menu.

  Fix Displayed Note Positions

We need to understand “display quantization”. It means what I think it means, but I had to go hunting in the documentation to confirm. Moves displayed notes to their “proper” positions. “Set the visual quantization value” describes what is going on, and why we might need it.

Quantize the timing of notes in the Logic Pro Score Editor — Apple Support

You can quantize, or automatically correct, the timing of individual MIDI notes in the Score Editor. This is useful when regions in the track contain the right notes, but are not perfectly in time with the project. When you quantize the timing, items are adjusted to the selected note value. You can quantize the timing of regions with drums, single-note instruments, and chordal or polyphonic instruments.

Logic Pro Quantize region parameter — Apple Support

You can fix the display quantization of all MIDI events in the projects using the Score Editor’s Functions > Quantization > Fix displayed Note Positions and Fix displayed Note Positions and Durations commands. These commands may be useful for exporting projects (complete with display Quantize settings) to other notation programs that don’t feature display quantization. The commands are also available from the shortcut menu when you Control-click notes in the score.