Musical Marking is a term used to describe the symbols and signs used in musical notation. These markings are used to indicate the pitch, rhythm, and tempo of a piece of music. Two common musical markings are the REST and the CLEF. A REST is a symbol that indicates a period of silence in a piece of music. It is represented by a rectangle with a diagonal line through it. A CLEF is a symbol that is placed at the beginning of a staff to indicate the pitch of the notes. It is represented by two curved lines that meet in the middle.