Display screen or portion thereof with transitional graphical user interface

FIG. 1 is a top right front perspective view of the first image in a sequence for a display screen or portion thereof with transitional graphical user interface showing our new design;

FIG. 2 is a top right front perspective view of the second image thereof;

FIG. 3 is a top right front perspective view of the third image thereof;

FIG. 4 is a top right front perspective view of the fourth image thereof;

FIG. 5 is a top right front perspective view of the fifth image thereof;

FIG. 6 is a front view of the image shown in FIG. 1 ;

FIG. 7 is a front view of the image shown in FIG. 2 ;

FIG. 8 is a front view of the image shown in FIG. 3 ;

FIG. 9 is a front view of the image shown in FIG. 4 ;

FIG. 10 is a front view of the image shown in FIG. 5 ;

FIG. 11 is a right-side view of the image shown in FIG. 1 ;

FIG. 12 is a right-side view of the image shown in FIG. 2 ;

FIG. 13 is a right-side view of the image shown in FIG. 3 ;

FIG. 14 is a right-side view of the image shown in FIG. 4 ;

FIG. 15 is a right-side view of the image shown in FIG. 5 ;

FIG. 16 is the image shown in FIG. 1 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 17 is the image shown in FIG. 2 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 18 is the image shown in FIG. 3 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 19 is the image shown in FIG. 4 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 20 is the image shown in FIG. 5 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 21 is the image shown in FIG. 6 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 22 is the image shown in FIG. 7 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 23 is the image shown in FIG. 8 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 24 is the image shown in FIG. 9 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 25 is the image shown in FIG. 10 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 26 is the image shown in FIG. 11 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 27 is image shown in FIG. 12 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 28 is the image shown in FIG. 13 , with additional dashed broken lines showing a mobile phone to illustrate an example environment;

FIG. 29 is the image shown in FIG. 14 , with additional dashed broken lines showing a mobile phone to illustrate an example environment; and,

FIG. 30 is the image shown in FIG. 15 , with additional dashed broken lines showing a mobile phone to illustrate an example environment.

The outer dashed broken lines around FIGS. 1-15 show a display screen or portion thereof and form no part of the claimed design; the dashed broken lines showing a mobile phone in FIGS. 16-30 are provided to show environment form no part of the claimed design; the remainder of the dashed broken lines in the figures show unclaimed portions of the graphical user interface and form no part of the claimed design.

The subject matter in this patent includes a process or period in which an image changes into another image. This process or period forms no part of the claimed design.