Portion of a Display Screen with a Graphical User Interface

FIG. 1 is a front view of a portion of a display screen with a graphical user interface showing my new design in accordance with a first embodiment; and,

FIG. 2 is an enlarged view of the portion of a display screen with a graphical user interface showing my new design as indicated in the section of FIG. 1 .

The broken lines showing a portion of a display screen form no part of the claimed design. The remaining broken lines showing portions of the graphical user interface form no part of the claimed design. The dot-dash broken lines show an enlarged view of FIG. 1 and form no part of the claimed design.