FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with a graphical user interface showing my new design; and,
FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with a graphical user interface showing my new design.
The outermost dash-dotted broken lines in the drawings illustrate the display screen or portion thereof and form no part of the claimed design. The dashed broken lines in the drawings illustrate portions of the graphical user interface that form no part of the claimed design.