Nudge Region/Event Length Right by Bar — Logic Pro X keyboard command of the day

  Nudge Region/Event Length Right by Bar

Extend the length of the region or event by a bar. The length of the extension depends on the time signature.

Only MIDI regions can be extended using this command. Applying it to an audio region does nothing, not even flash the “can’t do that” indicator.

The “Nudge Length” commands are not specifically mentioned in the documentation for resizing regions.

Resize regions in the Logic Pro Tracks area — Apple Support

You can shorten both audio and MIDI regions so that only part of the region plays. You can lengthen MIDI regions to add silence to the beginning or end of the region. In addition, you can resize the common edge of two adjacent regions to control the transition between them and remove overlaps.

Voice Separation Tool J — Logic Pro X keyboard command of the day

Shows the Voice Separation tool in action
  Voice Separation Tool  J

Switch the selected tool to the Voice Separation Tool. This tool is only available in the Tool Menu in the Piano Roll and Score Editor. The legend in the Tool menu does not show a J, it shows an up-arrow over a down-arrow.

NB the T command shows the Tool menu except when Logic first starts. You have to click on the Tool menu with the pointer before the T command becomes active. This, I think, is a bug.

Assign notes to voices and staffs in Logic Pro — Apple Support

Using the Voice Separation tool, you can draw a separation line between notes on a staff to assign them to the predefined MIDI channels of the voices.

Assign notes to voices and staffs in Logic Pro — Apple Support

Select the Voice Separation tool, then draw a line (between notes) where you want to separate the voices.

Show/Hide Assign 5 — Logic Pro X keyboard command of the day

  Show/Hide Assign 5

Shows or hides the fifth assignable MIDI control in the mixer. As with many of the numbered things like insert slots, projects, groups there is no good way to know what to expect to see. 

In the case of MIDI assigns, if all of them are visible, the stack of controls shrinks. In the case of two or three showing the assign will appear in numerical order, but the display might not change as expected.

Thankfully we have much larger displays these days and we can afford to simply leave all of the relevant tools visible.

Overview of MIDI channel strips in Logic Pro — Apple Support

Assign 1 to 5: Display up to five knobs that you can freely assign to any MIDI controller number.

View Mode: Selected Regions — Logic Pro X keyboard command of the day

  View Mode: Selected Regions

Set the piano roll to show notes/events from the selected regions as opposed to the focused track. The vertical line showing the MIDI regions is very useful. Who said all MIDI regions had to be the same color?

The control of the view is in the “View” menu of the Piano Roll.

View multiple regions in the Piano Roll Editor in Logic Pro — Apple Support

Notes from all of the selected regions appear in the Piano Roll Editor. The start point of each MIDI region is indicated by a vertical line of the same color as the MIDI region itself.

Open/Close MIDI Insert 5 Plug-in Window of focused Track — Logic Pro X keyboard command of the day

  Open/Close MIDI Insert 5 Plug-in Window of focused Track

Work with the MIDI Insert in slot 5 on the focused track. Defined commands go up to MIDI Insert 15, but documentation and implementation show that there can only be 8 MIDI Inserts.

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.