This is a revision of my previously submitted file. It makes better use of graphic icons for buttons and cleans up some inconsistencies in my previous upload. The principal design objective here was to make the screen as legible as possible given the rather dim nature of the TSU3000. I have been testing various screen icons and layouts on several people and feel that older users find it easier to use this schema than the more elegant 3D designs. Another objective was to make use the hard buttons: the row of buttons under the screen is used exclusively for navigating between screens.