FIG. 1 is a front view of a the first image of a transitional image for a portion of a display screen showing our new design; and,

FIG. 2 is a front view of the second image thereof.

The appearance of the image transitions sequentially between the images shown in FIGS. 1-2. The process or period in which the first image transitions to the other forms no part of the claimed design. The broken line showing of the regions within the claimed design and the areas within those regions form no part of the claimed design. The broken line showing of the portion of a display screen is for illustrative purposes only and forms no part of the claimed design.