There are literal arrowheads in the Spacing Modifier Letters block: U+02C2 ˂ ˂ Modifier Letter Left Arrowhead U+02C3 ˃ ˃ Modifier Letter Right Arrowhead U+02C4 ˄ ˄ Modifier Letter Up Arrowhead U+02C5 ˅ ˅ Modifier Letter Down Arrowhead Share Follow edited...
This is an interesting command, in that it is a modifier to other commands (namely COPY, FETCH, STORE and SEARCH). It instructs the server to use UIDs as arguments or results, rather than message sequence numbers (as is the default). ...