The ornamental design for a controlportion of a digital camera, as shown and described.
FIG. 1 is a rear elevational view of a control portion of a digital camera, according to the present invention; and,
FIG. 2 is a top, rear and left side perspective view thereof.
The broken lines in the drawings that encircle the solid lines are boundary lines for the respective figures and form no part of the claimed design. The other broken lines disclosed in the drawings are shown for illustration only and form no part of the claimed design.