US D557026 S1
We claim the ornamental design for a seating unit, as shown and described.
FIG. 1 is a front perspective view of a seating unit showing our design;
FIG. 2 is a left side view of FIG. 1, the right side view being a mirror image of the left side;
FIG. 3 is a is a front view of FIG. 1; and
FIG. 4 is a back view of FIG. 1; and,
FIG. 5 is a top view of FIG. 1.
In the drawings, the broken line showing of an adjustment handle depicts environmental subject matter and forms no part of the claim.