When this item is selected (displays a check mark in the menu), Finale automatically creates a new blank measure at the end the piece if you advance the editing frame beyond the last existing measure. In other words, if you're in the last measure of a piece and press the right bracket (]) key (or if "Jump to Next Measure" is selected and you fill the last measure to its rhythmic capacity), Finale adds a new blank measure and moves the editing frame to this new last measure.
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