this was discussed in the German Facebook group.
In books (studies) that contain exercises most commonly prior indication of a key change at the end of a line is not wanted.
There are two common ways to deal with this:
- don’t us key signatures at all and use accidentals all over the place
- hide the indicator at the end of the line.
Dorico should be able to handle both those ways properly.
Please see the following pictures as examples for point 2:
Trumpet methods from 1929 to 2015