Button

FIG. 1 is a front, top, right perspective view of an embodiment of a button, showing the new design;

FIG. 2 is a rear, bottom, right perspective view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is front view thereof;

FIG. 6 is an enlarged front view, as shown in FIG. 5 ;

FIG. 7 is a rear view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

Contrast in surface appearance is shown by line and stipple shading. The broken lines of even length illustrate portions of the surrounding autoinjector and form no part of the claimed design. The broken lines of uneven length illustrate the boundary of the claimed design and form no part thereof.