Portion of a display screen with a graphical user interface

[0001]FIG. 1 is a front view of a portion of a display screen with a graphical user interface showing my new design; and,

[0002]FIG. 2 is an enlarged view of the portion of the display screen as indicated in the section of FIG. 1 showing my new design.

[0003]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.