- Open the Key Signatures, Tonality Systems and Accidentals panel in Write mode.
- Select a tonality system by clicking the menu button and choosing one from the list. Dorico ships with two equal temperament tonality systems; one for 12-EDO (which is the default), and one for 24-EDO. It is possible to define your own by pressing the New Tonality System button, after which it will appear in the list.
- Input a key signature in the score at the point where you would like the tonality system to take effect from.
- The Accidentals panel will update to show the available accidentals for the selected tonality system.
- You can add as many tonality system changes to your flow as you like. Simply repeat the process at any point in the flow.