The ornamental design for a displaypanelportion with transitional graphical user interface, as shown and described.
FIG. 1 is a front view of a display panel portion with a transitional graphical user interface showing a first image in a sequence of the claimed design; and,
FIG. 2 is a front view of a second image included in the sequence of the claimed design.
The longer-incremented broken lines showing of a portion of a display panel of a communications terminal illustrate environment and form no part of the claimed design. The images and text in shown in finer-incremented broken lines illustrate features of the transitional graphical user interface that form no part of the claimed design.
The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1 to 2.