How do I find to write free without meSURE AND BARLINES
Welcome to the forum. Just start writing; don’t add a time signature! If you have one, select it and delete it.
You can also input an “open” time signature as well, e.g. if you want to indicate a free section within a piece that’s otherwise in time signatures.
Or if you want to add a free part later in the score, use shift-m and write x and press enter.