FIG. 1 is an upper front right perspective view of a marker showing my new design;
FIG. 2 is a lower front left perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right side elevation view thereof, with the left side elevation view being a mirror image of the right side elevation view;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is an enlarged top plan view thereof; and,
FIG. 7 is an enlarged bottom plan view thereof.
The feature shown in broken lines on the top of the marker in FIGS. 1 and 6 is included for the purpose of illustrating environment and forms no part of the claimed design.