Double-click on, above, or below the note or
measure to which you want to attach the marking. The Expression
Selection dialog box appears.
Click Tempo Alterations. All the tempo alteration expressions appear in the preview window.
If you see the “accel.” expression in the
list, double-click it. Finale places the "accel." expression into the score. Positioning is based on the Tempo Alterations Category settings (see Category Designer). If you do not see the "accel." expression, continue:
Click Create. The Expression Designer
dialog box appears.
Type “accel.” or “accelerando.” Finale automatically applies the font, size, and style of the Tempo Alterations category.
Click OK and then Assign to return to the score.To adjust the marking, drag its handle; to remove it, click the
handle and press DELETE. You have just added an expression to the expression
library - it will now be available to use elsewhere in this document.
For more details, see Expressions.