Display screen or portion thereof with a transitional graphical user interface

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) 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 in a sequence of the first embodiment according to claimed design;

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

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

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

FIG. 5 is a front view of a display screen or portion thereof with a transitional graphical user interface showing a first image in a sequence of a second embodiment according to the claimed design;

FIG. 6 is a front view of a second image thereof;

FIG. 7 is front view of a third image thereof;

FIG. 8 is a front view of a fourth image thereof;

FIG. 9 is a front view of display screen or portion thereof with a transitional graphical user interface showing a first image in a sequence of a third embodiment according to the claimed design;

FIG. 10 is a front view of a second image thereof;

FIG. 11 is front view of a third image thereof; and,

FIG. 12 is a front view of a fourth image thereof.

The appearance of the image transitions sequentially between the images shown in FIGS. 1-4, 5-8, and 9-12 , respectively.

The process or period in which an image transitions to another image forms no part of the claimed design.

The dash-dot line shows the display screen or portion thereof and forms no part of the claimed design. The broken-line showing of numbers forms no part of the claimed design.