Display Screen or Portion Thereof with a Graphical User Interface

FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface showing a first image in a sequence showing our new design; and,

FIG. 2 is a second image thereof.

The broken lines around the figures show a display screen or portion thereof and form no part of the claimed design. The broken lines within the figures show portions of the graphical user interfaces that form no part of the claimed design. The subject matter in this application includes a process or period in which the image of FIG. 1 changes into the image of FIG. 2 . This process or period forms no part of the claimed design.

The inventor anticipates that the invention can be any part, portion, element or combination of elements of the disclosed design. The various elements of the depicted design are not limited to the place on a display or portion thereof as shown in the figures.