Display screen or portion thereof with transitional graphical user interface

Description

FIG. 1 is the first image in a sequence for a display screen or portion thereof with transitional graphical user interface, showing our new design;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof; and,

FIG. 5 is the fifth image thereof.

The outermost broken line perimeters in the figures show a display screen or portion thereof and form no part of the claimed design. The broken lines within the display screen show portions of the 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. 1-5. The process or period in which one image transitions to another image forms no part of the claimed design.

Claims

The ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described.