Click the Articulation tool . If you haven’t
yet placed the mark in the score, click any note. When the Articulation
Selection dialog box appears, click the desired symbol and click Edit,
and then skip to step 3.
Double-click the handle. The Articulation
Designer dialog box appears.
Choose Playback > Change Duration. Select Values Are
Percentages. Enter 50 as the Top Note Value; leave the Bottom Note Value
blank. You’re telling Finale that a note affected by this mark
should last only 50% as long as it normally would. You can use any percentage
you like instead of 50%—just be sure Values Are Percentages is selected.