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 first image of a design for a display screen or portion thereof with transitional graphical user interface;

FIG. 2 is a front view of a second image of the display screen or portion thereof with transitional graphical user interface of FIG. 1 ;

FIG. 3 is a front view of a third image of the display screen or portion thereof with transitional graphical user interface of FIG. 1 ;

FIG. 4 is a front view of a fourth image of the display screen or portion thereof with transitional graphical user interface of FIG. 1 ;

FIG. 5 is a front view of a fifth image of the display screen or portion thereof with transitional graphical user interface of FIG. 1 ; and,

FIG. 6 is a front view of a sixth image of the display screen or portion thereof with transitional graphical user interface of FIG. 1 .

The outermost broken lines in the figures show a display screen or portion thereof, and form no part of the claimed design.

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