Enharmonic Shift: #    ⇧3

Change the notation for the current note(s) to the enharmonic spelling using sharps. A rare occurrence, but sometimes necessary.

Change how accidentals appear in a score in Logic Pro — Apple Support

By default, the display of accidentals depends on the chosen key signature. Using note attributes, you can change flats to sharps, and vice versa. For information about setting the key signature, see Add key and time signature changes to a score in Logic Pro.

  Nudge Region/Event Position Right by Beat

Move the currently selected region(s) to the right by one beat.

Move regions in the Logic Pro Tracks area — Apple Support

You can nudge regions (move them in small increments) left or right using key commands. To nudge regions, you first set the nudge value, then move selected regions by this value. Alternatively, you can nudge regions by a set value.

  Move Region to Recorded Position    ⌥⇧⌘R

Simple in concept. If I have moved a region on a track, and I want it to be placed back at the original point, move to recorded position seems perfect.

I was surprised with my test case, a song that was extracted from an hour-long set. I created regions for the tracks and exported the audio to work in a smaller project. When I sliced out a region, moved it, and tried to move it back I got a warning that the project had different time. Logic offered to offset time so I could place the audio at 1:43:10. This is actually useful if I want to refer back to the original full set recording.

Move regions in the Logic Pro Tracks area — Apple Support

This command only works for timestamped audio files, such as those recorded in the current project, and imported Broadcast Wave or SDII files. Timestamped files are indicated by a clock symbol in the Project Audio Browser.

  Open/Close MIDI Insert 14 Plug-in Window of focused Track

Opens (closes) the 14th MIDI Insert plug-in. That’s an awful lot of MIDI inserts on a channel.

Use MIDI plug-ins in Logic Pro — Apple Support

MIDI plug-ins are inserted in software instrument channel strips and process or generate MIDI data—played from a MIDI region or a MIDI keyboard—in real time. Included are the Arpeggiator, Chord Trigger, and Modulator, along with plug-ins for transposition, randomization and other processing. Scripter enables you to create your own MIDI processing and generation scripts.

MIDI plug-ins are connected in series before the audio path of a software instrument channel strip.

MIDI plug-ins have a MIDI input, the MIDI processor, and a MIDI output. The output signals sent from MIDI plug-ins are standard MIDI events such as MIDI note or controller messages.

  Assign To Exclusive Group: 2

Assigns the currently selected pad to exclusive group 2. There are 8 exclusive groups.

The description of exclusive groups using the hi-hat as an example explains the concept succinctly and clearly.

Use Logic Pro Drum Machine Designer pad controls — Apple Support

Exclusive Group: Choose a group for the pad. You can assign multiple pads to the same group. As soon as one drum sound in the group is triggered, all other sounds in that same group are stopped. For example, you could group three pads with open, semi-closed, and closed hi-hat sounds. Only one of these sounds can be played at a time, mirroring the behavior of real hi-hats.