Display panel or portion thereof with graphical user interface

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a front view of a display panel or portion thereof with graphical user interface showing our new design; and,

FIG. 2 is another front view thereof shown with the addition of environmental subject matter.

The broken line forming a rectangle in FIG. 1 , and the innermost broken line rectangle shown in FIG. 2 , illustrate a display panel or portion thereof. The broken lines within the rectangle thereof illustrate portions of the graphical user interface. The remaining broken lines in FIG. 2 illustrate environmental subject matter. None of the broken lines form part of the claimed design.