FIG. 1 is a top perspective view of a marker showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view with caps separated thereof.
The broken lines showing features on the top and bottom in FIGS. 6 and 7 are included for the purpose of illustrating portions that form no part of the claimed design.