CLAIM The ornamental design for user interface for a display screen on the top of a portable computer, as shown and described.
Description:
The FIGURE is a front view of a user interface for a portion of a display screen of the top of a portable computer showing my new design.
The broken line showings of the regions inside the user interface, the external display screen, and the top of a portable computer are for illustrative purposes only and form no part of the claimed design.