Set Punch In Locator by Playhead ⌃⌥⌘I — Logic Pro keyboard command of the day

  Set Punch In Locator by Playhead    ⌃⌥⌘I

Set the start of the punch in to the current position of the playhead.

Punch in and out of audio recordings in Logic Pro — Apple Support

Punch recording is a technique you can use to overwrite a portion of a previously recorded track, during playback, without touching any of the recording before or after that portion. You punch in to interrupt playback and make the recording, then punch out to return to playback mode. You can choose between two punch recording modes: Quick Punch-In mode and Autopunch mode.

Set Division Value to 1/8 Note — Logic Pro keyboard command of the day

  Set Division Value to 1/8 Note

Sets the division of beats to 8 (1/8 note). When working with MIDI instruments nudging values by division is a handy thing.

Set the time signature of a Logic Pro project — Apple Support

The division value defines the division in all position displays (such as in the editors), and forms the grid for various length and placement operations. The division value is normally set to 1/16 notes, but can range in value from 1/4 to 1/192 notes. If the note value of the division is equal to or greater than the bar denominator, the third value of the position display is removed.

Open MIDI Project Settings… — Logic Pro keyboard command of the day

  Open MIDI Project Settings…

Open the MIDI Project Settings window. You can set the project-specific MIDI values here. The settings here are not ‘General MIDI — GM’ settings.

Some very interesting things which might be of value, like the MIDI Thru settings. Investigate.

General MIDI settings in Logic Pro — Apple Support

Instrument Without MIDI Thru Function pop-up menu: The instrument selected here does not pass events through the computer when the instrument is assigned to the selected track. Normally, you would set the No Output instrument here (chosen by default).

Toggle Hide Group 1 ⌃⇧1 — Logic Pro keyboard command of the day

  Toggle Hide Group 1    ⌃⇧1

Toggle between showing and hiding the channels and tracks in group 1. NB the hiding of tracks is further controlled by the Hide button. When the Hide button is disengaged (green) tracks will not be hidden. The Hide checkbox on the track will be enabled or disabled as appropriate.

Hiding channels in the mixer windows can definitely help keep things from being confusing.

Hide tracks in Logic Pro — Apple Support

You can hide and unhide tracks using the menu commands in the Track menu (Hide Track, Unhide All Tracks, and Show Hidden Tracks), or using key commands. The first time you hide a track, you use the key command, after which the Hide button appears above the track headers.

Set Division Value to 1/128 Note — Logic Pro keyboard command of the day

  Set Division Value to 1/128 Note

Set the beat division to a 1/128th note.

Set the time signature of a Logic Pro project — Apple Support

The division value defines the division in all position displays (such as in the editors), and forms the grid for various length and placement operations. The division value is normally set to 1/16 notes, but can range in value from 1/4 to 1/192 notes. If the note value of the division is equal to or greater than the bar denominator, the third value of the position display is removed.