The ornamental design for a displayscreen or portion thereof with a graphicaluserinterface, as shown and described.
A portion of the disclosure of this patent document contains material for which a claim for copyright is made. 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 US Patent and Trademark Office patent file or records, but reserves all other copyrights whatsoever.
FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface showing a first embodiment of the claimed design; and,
FIG. 2 is another front view of FIG. 1, but showing alternative broken line subject matter.
The outer broken line illustrates the display screen or portion thereof and the inner broken lines and dotted lines (including the selection of the thumbnail images appearing in dotted lines, as shown in FIG. 2) illustrate portions of the graphical user interface. None of the broken lines form part of the claimed design.