Aerophone Pro AE-30: Can I set the display to always be on?

Yes.
The display on this instrument turns off automatically after a predetermined amount of time has passed since the buttons or controls were last operated.
Factory default time: 1 min.
To keep the display always on, edit the “Display Off Time” setting.

Perform the following procedure.

1. Press the [MENU] button.
   - The menu screen appears.
2. Use the [–] [+] (</>) buttons to select “Display Off Time,” and press the [MENU] button.
3. Select “Always On” with the [–] (<) button.
4. Press the [SCENE] (▲/▼) buttons to return to the scene screen.