Suppose you just recorded a piano part in the key of D, but when you look at the notation view you see that it was written in the key of C. The pitches are correct, but the notation view doesn’t know what key you want. To fix this, click on the treble or bass clef symbol at the left edge of any staff (you’ll know you’re in the right place when the cursor changes to a “#/b” symbol). A popup menu of all the possible key signatures will appear. Choose the appropriate key signature and the notation view will update its transcription of your recording.
