Sequences can be modified by clicking on "File > Modify > Sequence".
They can be modified in five ways.They are :
  
Add Screen :-
Delete Screen :-
Rename Sequence :-
Rename Screen :-
Reorder Screen :-
  
Add Screen :
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In the add screen window select the sequence name from the Drop
down box and add screen/s to the sequence by choosing the
existing screens or by entering new screen names.If more than
four screens are to be added then press "More" button and add
the screens in the same way.After completion press "Save & Exit"
button.
  
Delete Screen :
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In the delete screen window select the sequence name from the Drop
down box,accordingly all the screen names present under that selected
sequence will get shown on the other provided Drop down box.Select
the Screen name, which is to be deleted and press the "Delete" button.
A message box pops up confirming that the selected Screen has been
successfully deleted.
  
Rename Sequence :
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Select the sequence name from the Drop down box in the rename
sequence window. Enter new name in the "Enter New Sequence
Name" text field and press "Rename" button. Message "Sequence
Renamed Successfully" will be displayed.
    
Rename Screen :
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Select the sequence name from the Drop down box, then select the
screen to be renamed from the Drop down box. Enter the new name
for the screen in the "Enter New Screen Name" text field. Press
"Rename" button for renaming.
  
Reorder Screen :
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Select the sequence name from the Drop down box, all the screens in 
that sequence will be displayed in the list box, Reorder the screens
by pressing " ^ " for shifting upwards and " v " for shifting downwards
and press "Reorder" button for reordering the screens.