The ornamental design for a displaypanel or portion thereof with a transitionalgraphicaluserinterface, as shown and described.
FIG. 1 is a front view of a display panel or portion thereof with a graphical user interface showing a first image in a sequence of our design;
FIG. 2 is a front view of a display panel or portion thereof with a graphical user interface showing a second image in the sequence thereof; and,
FIG. 3 is a front view of a display panel or portion thereof with a graphical user interface showing a third image in the sequence thereof.
The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-3. The process or period in which one image transitions to another image forms no part of the claimed design.
The dot-dash-dot broken lines depicting a display panel or portion thereof are included for the purpose of illustrating portions of the article of manufacture and form no part of the claimed design. The remaining dot-dot broken lines, including all text, illustrate portions of the graphical user interface that form no part of the claimed design.