We claim the ornamental design for a display screen with a graphical user interface, as shown and described.
FIG. 1 is a front view of a display screen with a graphical user interface showing an image in a transitional sequence according to our new design; and,
FIG. 2 is a front view of the display screen with the graphical user interface showing another image in the transitional sequence according to our new design.
The outer dashed lines shown in FIGS. 1 and 2 illustrate the perimeters of screen portions and form no part of the claimed design.
The appearance of the transitional image sequentially transitions from the image of FIG. 1 to the image of FIG. 2 in a first embodiment, and from the image of FIG. 2 to the image of FIG. 1 in a second embodiment. The left edge of the screen portions remain stationary and provide a common point of reference between FIGS. 1 and 2. The process or period in which one image transitions to another image forms no part of the claimed design.