Display screen or portion thereof with transitional graphical user interface

Description

FIG. 1 is a front view of a display screen or portion thereof with transitional graphical user interface showing a first image in a sequence according to our new design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof; and,

FIG. 4 is a front view of a fourth image thereof.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-4. The process or period in which one image transitions to another image forms no part of the claimed design. The rectangular broken-line perimeter illustrates a display screen or portion thereof and forms no part of the claimed design. The remaining broken lines shown in the drawings form 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.