I claim the ornamental design for a multi-panel display blank, as shown and described.
FIG. 1 is a front view of a multi-panel display blank in accordance with the present invention.
FIG. 2 is a rear view of the multi-panel display blank of FIG. 1.
FIG. 3 is a front perspective view of a multi-panel display blank of FIG. 1 in a partially assembled state.
FIG. 4 is a front perspective view of the multi-panel display blank of FIG. 3 in a fully assembled state.
FIG. 5 is a front view of the multi-panel display blank of FIG. 4.
FIG. 6 is a rear view of the multi-panel display blank of FIG. 4.
FIG. 7 is a top view of the multi-panel display blank of FIG. 4.
FIG. 8 is a bottom view of the multi-panel display blank of FIG. 4.
FIG. 9 is a right-side view of the multi-panel display blank of FIG. 4; and,
FIG. 10 is a left-side view of the multi-panel display blank of FIG. 4.
The broken lines formed by linear segments of equal length in FIGS. 1 and 2 represent pre-weakened areas in the blank. The broken lines formed by a dot-dash-dot sequence in FIGS. 1-10 represent structure that form no part of the claimed design.