Select All Previous ⌃⌥⇧← — Logic Pro X keyboard command of the day

Logic Pro X keyboard command of the day. #LogicProX @StudioIntern1

  Select All Previous    ⌃⌥⇧←

Select all of the audio prior to the current playhead. Only in the Audio File Editor.

Audio File Editor overview — Logic Pro X

Most day-to-day audio editing tasks 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.