Display Screen or Portion Thereof Showing a Graphical User Interface

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

The sole FIGURE is a front view of a display screen or portion thereof showing a graphical user interface showing the claimed design.

The peripheral dashed broken lines illustrate a display screen or portion thereof and form no part of the claimed design.

The dashed broken lines within the peripheral dashed broken lines depict boundaries and/or portions of the graphical user interface which form no part of the claimed design.