No-Tab
Controls with this style set are skipped when the user navigates the screen using the Tab and the Backtab keys.
 
Example - Define a push-button that is not navigable by the tab key
screen section.
...
  03 screen-1-pb-3 Push-Button
     line 12.1
     column 15.2
     size 10.7 cells 
     lines 5.3 cells 
     id 3
     title "Go..."
     no-tab
     .