Display screen or portion thereof with a transitional graphical user interface

Description

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a front view of a display screen or portion thereof with a transitional graphical user interface showing a first image of the claimed design;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1 to 3. The process or period in which one image transitions to another image forms no part of the claimed design.

The dashed broken lines illustrate the display screen or portion thereof and form no part of the claimed design.

Claims

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