The ornamental design for a portion of a handle for a magnifier, as shown and described.
FIG. 1 is a perspective view of a portion of a handle for a magnifier showing our new design;
FIG. 2 is a perspective view of the portion of the handle showing a stand therefore in an exemplary extended position;
FIG. 3 is a top plan view of FIG. 1;
FIG. 4 is a bottom view of FIG. 1;
FIG. 5 is a right side elevational view of FIG. 1;
FIG. 6 is a left side elevational view of FIG. 1;
FIG. 7 is a first end elevational view of FIG. 1; and,
FIG. 8 is a second end elevational view of FIG. 1.
The dotted lines are intended to show features that are environmental only and form no part of the claimed design. Also, there is no intent to claim any surface indicia as all such surface lines are merely intended to be shading lines.