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 showing a first image in a sequence of a first embodiment according to my new design being shown in the context of a mobile application;

FIG. 2 is a front view showing a second image in the sequence thereof;

FIG. 3 is a detail view of a third image in the sequence thereof; and

FIG. 4 is a detail view of a fourth image in the sequence thereof.

FIG. 5 is a front view showing a first image in a sequence of a second embodiment according to my new design being shown in the context of a mobile application;

FIG. 6 is a front view showing a second image in the sequence thereof;

FIG. 7 is a detail view of a third image in the sequence thereof; and,

FIG. 8 is a detail view of a fourth image in the sequence thereof.

The appearance of the transition is sequential from FIG. 1 through FIG. 4 in the first embodiment and from FIG. 5 through FIG. 8 in the second embodiment. The process or period in which an image transitions to another image forms no part of the claimed design.

The shading shown in the images are part of the claimed design.

The broken line showing of a display screen or portion thereof with graphical user interface is included for the purpose of illustrating environmental structure and forms no part of the claimed design.