SYNOPSIS:
    MARKER_SHOW [-m] name|*

DESCRIPTION:
    Show position and color of the marker called name or all
    markers, if name is '*'.
    The option -m requests "machine readable" format, where no
    efforts are made to "pretty print", but rather to have a simple
    space-separated output format.

SEE ALSO:
    marker, MARKER_ADD, MARKER_DEL
