1. Display screen or portion thereof with a transitional graphical user interface
1.1
1.2
1.3
1.4
1.5
1.6
1.7
The broken line display screen as well as the broken lines showing portions of the transitional graphical user interface are included for illustrative purposes only and form no part of the claimed design.
The appearance of the transitional image sequentially transitions between the images shown in figs.