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When an action bar process is invoked, it will appear on the top lines of the screen panel like this example:

   ^{1  Action 1  Action 2  Action 3  Action 4  Action 5  Action 6 
   2  ___________________________________________________________}
   3  <<Panel Id>>                << Panel Title >>                    
 ^{_
   3  <<Panel Id>>                    << Panel Title >>}                    

Note the separator line on line 2. The separator line always appears immediately below the last action bar line. It cannot be suppressed or changed in any way.

...

An action bar can have from 1 to 18 choices. So it can actually push the underlying "panel body" down like this (using 7 to 12 choices):

 ^{1   Action 1    Action 2    Action 3}   
 1   Action 1  Action 2  Action 3  Action 4  Action 5  Action 6 
 2   Action 7  Action 8  Action 9  Action 10 Action 11 Action 12
 3  ^{Action 4     Action 5     Action 6 
 2   Action 7    Action 8    Action 9    Action 10   Action 11   Action 12
 3  ___________________________________________________________________}
 4                              << Panel Title >>                      
 ^{__
 4                                                  << Panel Title >>}                      

Or even like this (using 13 to 18 choices):

 ^{1   Action 1    Action 2    Action 3    Action 4}   
 1 Action 1  Action 2  Action 3   Action 4   Action 5   Action 6 
 2 Action 7  Action 8  Action 9   Action 10  Action 11  Action 12
 3 Action 13 Action 14 Action 15  Action 16  Action 17  Action 18
 4  ^{Action 5     Action 6 
 2   Action 7    Action 8    Action 9    Action 10   Action 11   Action 12
 3   Action 13  Action 14  Action 15  Action 16   Action 17   Action 18
 4 ______________________________________________________________________}
 5                    << Panel Title >>                        
  ^{5                                << Panel Title >>}                        

Options are selected from the action bar by positioning the screen cursor on, or immediately before, the choice and pressing the enter key.

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The text that you use to identify each action bar choice should be set up according to the guidelines prescribed by CUA 1989.