The ornamental design for a portion of a display with a graphicaluserinterface, as shown and described.
FIG. 1 is a front view of a portion of a display with a graphical user interface showing the first embodiment of my new design in a portrait configuration;
FIG. 2 is a front view of a second embodiment thereof, shown in a landscape configuration;
FIG. 3 is a front view of a third embodiment thereof, shown in a portrait configuration;
FIG. 4 is a front view of a fourth embodiment thereof, shown in a landscape configuration;
FIG. 5 is a front view of a fifth embodiment thereof, shown in a portrait configuration; and,
FIG. 6 is a front view of a sixth embodiment thereof, shown in a landscape configuration.
The broken line showing of the portion of a display screen and the broken line showing of the portion of the graphical user interface are included for the purpose of illustrating portions of the article and form no part of the claimed design.