One-bar Repeat Sign: The sign to designate the repeat of an entire measure is a single slash with two dots (shown below) within the measure immediately after the measure to be repeated. A composer can use any number of one-bar repeat signs in a row, although after several one-bar repeat signs it becomes difficult for the performer to visually keep track of the number of repeatsperformed. Thus, it becomes necessary to indicate the number of the repeatedmeasures by placing a number over the measure (often every two or four measures).
Two-bar Repeat Signs:
The most common sign to designate the repeat of a two-measurephrase is a double slash with two dots (shown below) on the bar line between the two measures immediately after the two measures to be repeated. The number two is typically centered over the sign, but is technically not reqired. A composer can use any number of two-bar repeat signs in a row.
A rare alternate way to designate the repeat of a three or four-measurephrase is the use of word bis (meaning twice) centered in brackets over the phrase. This is the same as the two-bar repeat sign, only indicating more than two measures to be repeated.