To modify form height by a specified height or distance

Select (Modify Form).
Click Modify the Height of a Form icon.
From the Method option menu, select Add Distance.
From the Mode option menu, select Absolute or Relative.
Key in a Height or Distance value for Absolute or Relative mode respectively.
Select the form to modify. The form height changes by the specified value.
Tip: To modify multiple forms at the same time, use the PowerSelector tool to create a selection set.