Changing the beat affects the way music is grouped. Unless you explicitly group notes together, the notes are grouped together by beat. For example, suppose you have six eighth notes in a 6/8 bar. If you choose quarter as the beat, notes will be grouped into three groups of two eighth notes each. If you choose dotted eighth as the beat, the notes in the bar will be grouped into two groups of three eighth notes each.
Note: Some combinations of beat and time signature are not allowed. The rule is the bar must be able to be broken into an integral number of beats. If you try to select a beat value that doesn't work with a given time signature, QuickScore Elite will not let you exit the Display Score dialog until you have selected a compatible beat value.
The beat can be changed on a bar-by-bar basis or for your entire score. Set the beat for the entire score by selecting Score from the Display menu and changing the Beat value. Set the beat starting at the current bar and continuing until the next change in beat by selecting Bar from the Display menu and changing the Beat value. The beat affects all tracks.