New Editor: creates
a second Score View which opens in a second tab behind the current
editor field.
Navigation: allows to
activate and switch between editors. Activated editors can be
minimized and maximized. You can choose the previous perspective,
editor or view.
Preferences:
Here you can also change some preferences for MEISE under "Meise
Preferences", e.g. to force the Lab to use the MEISE perspective
when opening a MEI document.