manual/include/transposing-midi.html

<figure>
  <img width="50%" src="/images/transpose_midi.png" alt="The Transpose dialog">
  <figcaption>
    The Transpose dialog
  </figcaption>
</figure>

<p>
  A whole region, or multiple regions, can be transposed at once, with the help
  of the Transpose MIDI dialog, accessed by <kbd class="mouse">right</kbd> clicking a region
  <kbd class="menu">&gt; <em>name_of_the_midi_region</em> &gt; MIDI &gt; Transpose&hellip;
  </kbd>.
</p>

<p>
  This very simple dialog allows to choose either a number of semitones to add
  or subtract to all the notes inside the region(s), and/or for more significant
  changes, octaves (12 semitones).
</p>