Display screen or portion thereof with transitional graphical user interface

Description

FIG. 1 is the front view of 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;

FIG. 5 is the fifth image thereof; and,

FIG. 6 is the sixth image thereof.

The outermost broken line in each drawing figure illustrates a display screen or portion thereof that forms no part of the claimed design.

The remaining broken lines in the figures depict portions of the transitional graphical user interface that form no part of the claimed design.

The appearance of the transitional graphical user interface sequentially transitions between the images shown in FIGS. 1 through 6. The process or period in which one image transitions to another forms no part of the claimed design.

The gray color in the drawings represents a contrast in appearance.

Claims

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