Display Screen or Portion Thereof with 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 transitional graphical user interface showing a first image according to the claimed design;

FIG. 2 is a front view of a display screen or portion thereof with transitional graphical user interface showing a second image according to the claimed design;

FIG. 3 is a front view of a display screen or portion thereof with transitional graphical user interface showing a third image according to the claimed design; and,

FIG. 4 is a front view of a display screen or portion thereof with transitional graphical user interface showing a fourth image according to the claimed design.

The appearance of the transitional graphical user interface transitions between the images shown in FIGS. 1 - 4 . The process or period in which the transitional graphical user interface transitions forms no part of the claimed design. The broken line at the periphery of FIGS. 1 - 4 illustrates a display screen or portion thereof and forms no part of the claimed design.