Display Screen or Portion Thereof with Transitional Graphical User Interface

FIG. 1 is a front view of a display screen or portion thereof with transitional graphical user interface showing a first image in a sequence of the graphical user interface according to the claimed design, with the display screen or portion thereof shown on a smart phone.

FIG. 2 is a front view of the display screen or portion thereof with transitional graphical user interface showing a second image in the sequence of the graphical user interface, with the display screen or portion thereof shown on the smart phone.

FIG. 3 is a front view of the display screen or portion thereof with transitional graphical user interface showing a third image in the sequence of the graphical user interface, with the display screen or portion thereof shown on the smart phone; and,

FIG. 4 is a front view of the display screen or portion thereof with transitional graphical user interface showing a fourth image in the sequence of the graphical user interface, with the display screen or portion thereof shown on the smart phone.

The dash-dash broken lines in the drawings illustrate portions of the display screen or portion thereof with transitional graphical user interface that form no part of the claimed design.

The dash-dot broken lines in the drawings define the bounds of the claimed design and form no part thereof.

The appearance of the graphical user interface sequentially transitions between the images shown in FIGS. 1 - 4 . The process or period in which an image transitions to another forms no part of the claimed design.