Edited sentence: A bold double bar line indicates the conclusion of a movement or an entire composition.Accolade, braceConnects two or more lines of music that are played simultaneously.Also used at changes in key signature or major changes in style or tempo.Bar line, BarlineUsed to separate measures (see time signatures below for an explanation of measures).Bar lines are extended to connect the upper and lower staffs of a grand staff.Dotted bar line, Dotted barlineSubdivides long measures into shorter segments for ease of reading, usually according to natural rhythmic subdivisions.Double bar line, Double barlineUsed to separate two sections or phrases of music.In music education, the mnemonic "Every Good Boy Does Fine" is used to remember the value of each line from bottom to top.It is used for keyboard and harp music.Ledger lines, Leger linesUsed to extend the staff to pitches that fall above or below it.Staff,  StaveThe fundamental latticework of music notation, upon which symbols are placed.Such ledger lines are placed behind the note heads, and extend a small distance to each side.The five staff lines and four intervening spaces correspond to pitches of the diatonic scale - which pitch is meant by a given line or space is defined by the clef.The grand staff combines bass and treble staffs into one system joined by a brace.The interstitial spaces are often remembered as spelling the word "face" (notes F-A-C-E).The lines on a basic five-line staff are designated a number from one to five, the bottom line being the first one and the top line being the fifth.The spaces between the lines are, in the same fashion, numbered from one to four.With treble clef, the bottom staff line is assigned to E above middle C (E4 in note-octave notation); the space above it is F4, and so on.org > U+007B LEFT CURLY BRACKET Retrieved on May 3, 2009.| width=12.5% | 100px