Lower Pitch By Octave

`Command` + `Down Arrow`

All hotkeys for MuseScore (MacOS)

Navigation Shortcuts Beginning of Score	`Home`
Navigation Shortcuts End of Score	`End`
Navigation Shortcuts Next Score	`Command` + `Tab`
Navigation Shortcuts Previous Score	`Shift` + `Command` + `Tab`
Navigation Shortcuts Zoom In	`Command` + `+`
Navigation Shortcuts Zoom Out	`Command` + `-`
Note Input Shortcuts Begin Note Input Mode	`N`
Note Input Shortcuts Leave Note Input Mode	`Esc`
Duration Shortcuts Half Duration Of Previous Note	`Q`
Duration Shortcuts Double Duration Of Previous Note	`W`
Duration Shortcuts Decrease Duration By a Dot	`Shift` + `Q`
Duration Shortcuts Increase Duration By a Dot	`Shift` + `W`
Voices Shortcuts Voice 1	`Command` + `Option` + `1`
Voices Shortcuts Voice 2	`Command` + `Option` + `2`
Voices Shortcuts Voice 3	`Command` + `Option` + `3`
Voices Shortcuts voice 4	`Command` + `Option` + `4`
Pitch Shortuts Repeat Previous Note or Chord	`R`
Pitch Shortuts Raise Pitch By Octave	`Command` + `Up Arrow`
Pitch Shortuts Lower Pitch By Octave	`Command` + `Down Arrow`
Pitch Shortuts Repeat Selection	`R`
Pitch Shortuts Raise Pitch By Semi-Tone	`Up Arrow`
Pitch Shortuts Lower Pitch By Semi-Tone	`down Arrow`
Interval Shortcuts Add Inreval Above Current Note	`Option` + `Num`
Layout Shortcuts Flip Direction	`X`
Layout Shortcuts Mirror Note Head	`Shift` + `X`
Layout Shortcuts Increase Stretch of Measure(S)	`}`
Layout Shortcuts Decrease Stretch of Measure(S)	`{`
Layout Shortcuts page Back On Selected Barline	`Command` + `Return`
Articulations Shortcuts Staccato	`Shift` + `S`
Articulations Shortcuts Tenuto	`Shift` + `N`
Articulations Shortcuts Sforzato	`Shift` + `V`
Articulations Shortcuts Marcato	`Shift` + `O`
Articulations Shortcuts Crescendo	`<`
Articulations Shortcuts Decrescendo	`>`
Text Entry Shortcuts Staff Text	`Command` + `T`
Text Entry Shortcuts System Text	`Command` + `Shift` + `T`
Text Entry Shortcuts Tempo Text	`Option` + `T`
Text Entry Shortcuts Rehearsal Mark	`Command` + `M`
Lyrics Entry shortcuts Enter Lyrics on a Note	`Command` + `L`
Lyrics Entry shortcuts Previous Lyrics Syllable	`Shift` + `Space`
Lyrics Entry shortcuts Move Lyric Syllable Left by 0.01sp	`Option` + `left Arrow`
Lyrics Entry shortcuts Move Lyric Syllable Right by 0.01sp	`Option` + `Right Arrow`
Lyrics Entry shortcuts Up to Previous Stanza	`Command` + `Up Arrow`
Lyrics Entry shortcuts Down to Next Stanza	`Command` + `Down Arrow`
Display Shortcuts Navigator	`F12`
Display Shortcuts Play Panel	`F11`
Display Shortcuts Mixer	`F10`
Display Shortcuts Palette	`F9`
Display Shortcuts Inspector	`F8`
Display Shortcuts Selection Filter	`F6`
Miscellaneous Shortcuts Toggle Visibility on Selected Element(S)	`V`
Miscellaneous Shortcuts Show Instruments Dialog	`I`
Miscellaneous Shortcuts Toggle Multi-Measure Rests On or Off	`M`