Specify the range of measures you want to be affected by the meter change.See Beaming for further important information on time signatures and beaming patterns. If you “spell” it as two dotted quarter notes, however, Finale beams eighth notes in groups of three (bottom example). This is particularly important when you’re working in 6/8 or any compound meter if you “spell” the time signature as a string of six eighth notes, Finale won’t perform any automatic eighth-note beaming, as shown below (top example). In the case of cut time, for example, you should set the scroll bars so that the display shows two half notes, meaning that the eighth notes will be beamed together in groups of four. The way you define your meter is important, because it also governs beaming.
The upper scroll bar governs the upper number (beats per measure) of the time signature the lower one governs the bottom number (the rhythmic value) of the time signature. Noteman says: View the Changing the time signature QuickStart Video for an overview. Time signatures To change the time signature