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 tab-control in screen section that would be skipped when tab is pressed
screen section.
...
  03 screen-1-tc-1 Tab-Control
     line 2.8
     column 25.7
     size 34.6 cells 
     lines 28.9 cells 
     help-id 1036
     id 10
     background-low
     bold
     no-tab
     .