FIG. 1 is a top perspective view of a desktop riser with the legs extended;
FIG. 2 is a bottom perspective view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a bottom view of FIG. 1;
FIG. 5 is a left-side view of FIG. 1;
FIG. 6 is a right-side view of FIG. 1;
FIG. 7 is a front view of FIG. 1;
FIG. 8 is a rear view of FIG. 1;
FIG. 9 is a top perspective view of the design of FIG. 1 with the legs folded;
FIG. 10 is a bottom perspective view of FIG. 9;
FIG. 11 is a top view of FIG. 9;
FIG. 12 is a bottom view of FIG. 9;
FIG. 13 is a left-side view of FIG. 9;
FIG. 14 is a right-side view of FIG. 9;
FIG. 15 is a front view of FIG. 9; and,
FIG. 16 is a rear view of FIG. 9.
The broken lines shown on the drawings depict portions of the desktop riser that form no part of the claimed design.