The ornamental design for a desktopspacer, as shown and described.
FIG. 1 is a perspective view of a Desk Top Spacer, showing our new design, the broken lines are for environmental purposes only and form no part of the claimed design;
FIG. 2 is a first perspective view of the desk top spacer of the invention;
FIG. 3 is a second perspective view of the spacer illustrated in FIG. 2, the view in FIG. 3 showing the reverse side of the spacer;
FIG. 4 is a top view of the spacer illustrated in FIG. 2;
FIG. 5 is a back view of the spacer illustrated in FIG. 2;
FIG. 6 is an end view of the spacer illustrated in FIG. 2;
FIG. 7 is a front view of the spacer illustrated in FIG. 2; and,
FIG. 8 is a bottom view of the spacer illustrated in FIG. 2.