Abstract
An aiding tool of viewing PC display, which is employed to prevent overlook left side of the focusing window, for unilateral
spatial neglect observers, is investigated. Basic concept of this tool is magnifying a part of display based on observer's requests. As the
results of user-interface examinations, three points are employed: (1) an whole window flushing effect in order to paying easy attention when
opening the magnifying window, (2) temporal control sequence of typing double same special key (Ctrl, Alt, etc.) and subsequent another
normal key for easy operation by hemiplegia users, and (3) a combination color design adopting to four sides of a window frame for easy
paying attention to the left side. This tool is also effective to users with presbyopia and/or users who want to add more active window effects
for presentations.