Display Screen or Portion Thereof with a Graphical User Interface

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

The single view is a front view of a display screen or portion thereof with a graphical user interface.

The outermost dot-dash broken lines illustrate a display screen or portion thereof and form no part of the claimed design. The remaining dashed broken lines (i) show text in the drawing that illustrates portions of the graphical user interface that form no part of the claimed design and (ii) illustrate and enclose faded portions of the graphical user interface that form no part of the claimed design.