How do you add a trill to finale?

To add a trill in Finale, select the note where you want the trill to occur. Then, go to the "Articulations" tool and choose the trill symbol from the articulation palette. Click on the note to place the trill, and you can adjust its playback settings in the "Trills" dialog box by selecting the note and navigating to "Music" > "Trills" in the menu. Finally, you can customize the trill's playback and duration as needed.