In order to help clarify which notes are played by the right and left hands, the stems of some notes point in a different direction to the default according to their pitch. To match this, you can change the stem direction of individual notes.
Procedure
Result
The stems of the selected notes are flipped: the Cs now point upwards and the B♭s downwards.
Note
We don’t recommend flipping the direction of stems when instead you should change notes to an up-stem or down-stem voice. Where rests aren’t shown, Dorico automatically changes the stem direction of notes according to their pitch, regardless of their voice.