The ornamental design for a verticalpanel, as shown and described.
FIG. 1 is a perspective view of a vertical panel according to a first embodiment of our new design;
FIG. 2 is a front plan view thereof;
FIG. 3 is a back plan view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a front plan view of a second embodiment of the vertical panel, having the same appearance as FIGS. 1 through 7;
FIG. 9 is a front plan view of a third embodiment of the vertical panel, having the same appearance as FIGS. 1 through 7; and,
FIG. 10 is a front plan view of a fourth embodiment of the vertical panel, having the same appearance as FIGS. 1 through 7.
The longer dash-dash broken lines in each figure, including the shelves, illustrate environmental structure and form no part of the claimed design, while the vertical surface extends in a continuous manner behind the shelves.