Dimmer switch

FIG. 1 is a front perspective view of a dimmer switch showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The dashed broken lines represent structure or features which form no part of the claimed design; the broken lines themselves form no part of the claimed design.