Patent Publication Number: US-D987679-S

Title: Display screen or portion thereof with transitional graphical user interface

Description:
FIG.  1    is a front view of a first image in a sequence according to our design for a display screen or portion thereof with transitional graphical user interface; 
         FIG.  2    is a front view of a second image in the sequence thereof; and, 
         FIG.  3    is a front view of a third image in the sequence thereof. 
       The appearance of the transitional image transitions between the images shown in  FIGS.  1 - 3   . The process or period in which one image transitions to another forms no part of the claimed design. The shading depicts a contrast of appearance and is a part of the claimed design. 
       The outer broken line rounded rectangles showing a device, the broken line rectangle showing the display screen or portion thereof, and all other broken lines showing portions of the graphical user interface form no part of the claimed design.