Display screen or portion thereof with transitional graphical user interface

Description

1. Display screen or portion thereof with transitional graphical user interface

1.1: Front, first image in a sequence;

1.2: Front, second image in a sequence;

1.3: Front, third image in a sequence.

The outermost broken lines illustrate a display screen or portion thereof and form no part of the claimed design; the remaining broken lines shown in the reproductions illustrate portions of the display screen or portion thereof with 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 reproductions. 1.1-1.3; 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.