Display screen or portion thereof having a graphical user interface

A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.

FIG. 1 is a front view of a first embodiment of a display screen or portion thereof having a graphical user interface;

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof having a graphical user interface; and,

FIG. 3 is a front view of a third embodiment of a display screen or portion thereof having a graphical user interface.

The dot-dashed broken lines depict a boundary of the display screen or portion thereof or a boundary on the display screen and form no part of the claimed design. The dashed broken lines depict portions of the display screen or portion thereof having a graphical user interface which form no part of the claimed design.