#LogicProX @StudioIntern1

  Select All Previous Samples    ⌃⌥⇧←

Selects all of the samples to the left of the playhead.

Logic Pro Audio File Editor overview — Apple Support

Most day-to-day audio editing tasks in Logic Pro are performed in the main window and Audio Track Editor. The Audio File Editor is useful for removing pops and clicks in audio material, setting accurate crossover points for looped playback, correcting phase cancellation errors, and more.
You can use the Audio File Editor to work with transient markers that indicate significant points—or transients—in an audio file. The audio on a track is analyzed for transients the first time you enable that track for Flex Time editing. Any detected transients in the file are marked.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND

#LogicProX @StudioIntern1

  Stem End: Move Down    ⌥⌘↓

Change the length of selected note stems by moving downward. Stems that are “up” get shorter. Stems that are “down” get longer.

Control beaming in the Logic Pro Score Editor — Apple Support

Stem End: Move Down: As above, but moves the stem end downward.

⇧ SHIFT  –  ⌃ CONTROL  –  ⌥ OPTION  –  ⌘ COMMAND

#LogicProX @StudioIntern1

  Paste to New Row   ⌃⇧V

Creates a new row in the Step Sequencer with the contents of the clipboard.

Edit Step Sequencer rows in Logic Pro — Apple Support

You can edit Step Sequencer rows in a variety of ways, including copying and pasting rows or row settings, duplicating a row with the next row assignment, changing the row assignment, resetting row values to a default setting, and deleting a row.

Logic Pro Step Sequencer overview — Apple Support

Step Sequencer is inspired by classic hardware step sequencers that have rows of configurable switches or knobs used to generate repeating musical patterns. In Step Sequencer, you create patterns by editing multifunctional steps in the step grid. Each row controls either a sound (which can be a drum kit piece, a note on an instrument, or a range of notes) or an automation parameter (letting you create automation changes over time in the pattern). Each step represents a definable length of musical time–by default, steps are of equal length, but you can change the length for individual rows or steps. You can adjust a wide range of parameters for individual steps, including velocity, pitch, gate time, and more; and edit pattern and row settings including pattern length, row loop start and end points, playback position, and rotation.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND

#LogicProX @StudioIntern1

  Quantize 1/16 Swing E

The fine art of humanizing machine-generated musical sounds.

Logic Pro Quantize parameter values — Apple Support

You can quantize selected audio or MIDI regions (including a mixed region selection) using the Quantize parameter in the Region inspector. This parameter determines the division of the quantization grid.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND

#LogicProX @StudioIntern1

  Zoom All    ↑

There are lots of Zoom commands. It’s fallout from having small screens on our computers that need to display lots of detail. Fills the Smart Tempo Editor window with the entire audio region or MIDI region.

Work in the Logic Pro Smart Tempo Editor — Apple Support

Press the Up Arrow to zoom out so that the entire audio file or MIDI region is visible.

⇧ SHIFT – ⌃ CONTROL – ⌥ OPTION – ⌘ COMMAND