Display Screen or Portion Thereof with a Transitional Graphical User Interface

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

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

FIG. 2 is a front view of a second image in a sequence of a display screen or portion thereof with a transitional graphical user interface showing the new design.

FIG. 3 is a front view of a third image in a sequence of a display screen or portion thereof with a transitional graphical user interface showing the new design.

FIG. 4 is a front view of a fourth image in a sequence of a display screen or portion thereof with a transitional graphical user interface showing the new design.

FIG. 5 is a front view of a fifth image in a sequence of a display screen or portion thereof with a transitional graphical user interface showing the new design; and,

FIG. 6 is a front view of a sixth image in a sequence of a display screen or portion thereof with a transitional graphical user interface showing the new design.

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

The outermost broken line showing the display screen is included is for the purpose of illustrating portions of the display screen or portion thereof and form no part of the claimed design.