Bar Line -

: A double bar line accompanied by two dots. If the dots face left, the performer must repeat the previous section; if they face right, they mark the start of the section to be repeated.

: The most standard vertical line, used to mark the end of one measure and the beginning of the next. bar line

: A thin line followed by a thicker one, signaling that the piece of music has officially concluded. : A double bar line accompanied by two dots

: Two thin vertical lines that indicate a significant change in the music, such as the end of a section, a key change, or a shift in tempo. if they face right