text is a tough way to do audio — ⇧ SHIFT — ⌃ CONTROL — ⌥ OPTION — ⌘ COMMAND
How to Ace the “Static Mix”: Get Levels & Panning Right the 1st Time — SonicScoop:
In this article, I’m going to show you how to nail the most important step in mixing. If you want high-quality mixes, getting the volume balance right (also known as the “static mix”) is crucial.
Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1
Solo Mode ⌃S
Solo the selected region(s). I have learned to use the Solo Tool for listening to tracks to investigate. Using Solo Mode will help me during mixing and editing.
Mute and solo regions in the Tracks area — Logic Pro X:
You can mute one or more regions in the Tracks area to exclude them from playback. You can also solo individual regions, to hear them in isolation, and lock the solo status of regions.
⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND
Equalizers are the most fundamental tool we have to shape the sound flowing through our tracks. There are different types, shapes, curves, and controls, but they all fundamentally do the same thing. Boost or attenuate specific areas of the frequency spectrum.
Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1
Set Smart Tempo MTR Handling to Ignore
Nothing. Zip. Nada. Cannot locate anything that remotely refers to “MTR Handling”.
Unless that is shorthand for “Musical tempo reference” which I found here…
Smart Tempo overview — Logic Pro X:
Musical tempo reference
When using Smart Tempo in Adapt mode (or when Auto uses Adapt behavior), the results depend on whether a musical tempo reference is present in the part of the project to which you are recording or adding a file. A musical tempo reference exists when the metronome is active, when audio, MIDI, or Drummer regions are present in the part of the project where you are working, or when Cycle mode is turned on.
In most cases, when you hear any musical material while recording, a musical tempo reference is present. If you do not hear any material, no musical tempo reference is present.
Tip: To avoid having a musical tempo reference while recording, solo the track you are recording to before recording.
Given the description here the commands start to make sense. Setting MTR Handling to “ignore” would have the same effect as soloing the track being recorded to, except that you would still hear the musical reference.
Toggle Smart Tempo Mode (Keep/Adapt)
Set Smart Tempo Mode to Keep
Set Smart Tempo Mode to Adapt
Set Smart Tempo Mode to Automatic ⌃⌥8⃣
Toggle Smart Tempo MTR Handling
Set Smart Tempo MTR Handling to Write
Set Smart Tempo MTR Handling to Ignore
Toggle Smart Tempo Trim to Downbeat
⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND
Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1
Set Layout Tool 
Choose the “Layout Tool” in the “left-click” tool drop down (same place as pointer, solo, et al.)
The Layout Tool is what you use to change the position of a note in the score without affecting the actual time placement of the note. If you use the Pointer Tool to drag a note from 4 1 1 1 to the left to 3 1 1 1 the note will move, and apparently “replace” anything that used to be between 3 1 1 1 and 4 1 1 1.
If you use the Layout Tool to move the note left or right (no vertical movement is possible) the placement of the event in time will not change. You can move a note at 4 1 1 1 to the left to get it closer to the bar line, or to the right to get closer to the next note. Timing will not change.
It is best to use a MIDI loop and play with it in the Score Editor to get a feeling for what is possible.
Position items graphically in the Score Editor — Logic Pro X:
Using the Layout tool: The Layout tool is used to graphically move events in the Score Editor, in order to optimize the display without altering the timing of MIDI events.
⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND