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 according to our new design;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof;

FIG. 5 is a fifth image thereof;

FIG. 6 is a sixth image thereof;

FIG. 7 is a seventh image thereof;

FIG. 8 is an eighth image thereof;

FIG. 9 is a ninth image thereof;

FIG. 10 is a tenth image thereof;

FIG. 11 is an eleventh image thereof;

FIG. 12 is a twelfth image thereof;

FIG. 13 is a thirteenth image thereof;

FIG. 14 is a fourteenth image thereof;

FIG. 15 is a fifteenth image thereof;

FIG. 16 is a sixteenth image thereof;

FIG. 17 is a seventeenth image thereof;

FIG. 18 is an eighteenth image thereof;

FIG. 19 is a nineteenth image thereof;

FIG. 20 is a twentieth image thereof;

FIG. 21 is a twenty-first image thereof;

FIG. 22 is a twenty-second image thereof;

FIG. 23 is a twenty-third image thereof;

FIG. 24 is a twenty-fourth image thereof;

FIG. 25 is a twenty-fifth image thereof;

FIG. 26 is a twenty-sixth image thereof;

FIG. 27 is a twenty-seventh image thereof;

FIG. 28 is a twenty-eighth image thereof;

FIG. 29 is a twenty-ninth image thereof;

FIG. 30 is a thirtieth image thereof;

FIG. 31 is a thirty-first image thereof;

FIG. 32 is a thirty-second image thereof;

FIG. 33 is a thirty-third image thereof;

FIG. 34 is a thirty-fourth image thereof; and,

FIG. 35 is a thirty-fifth image thereof.

The appearance of the transitional user interface sequentially transitions between the images shown in FIGS. 1 - 35 .

The process or period in which one image transitions to another forms no part of the claimed design.

The broken line perimeter shown in FIGS. 1 - 35 is included for the purpose of showing a display screen or portion thereof and forms no part of the claimed design.

The broken line text, and other elements shown in broken line in FIGS. 1 - 35 , form no part of the claimed design.