I am currently using ES2 and my Preview Tab does not appear.
Does anyone know what might be the problem?
The preview tab is 'missing' where adobe LCDesigner is installed but Acrobat Pro (or Reader) is not installed.
SOLUTION: You must install either Acrobat Pro (or Reader) -- then LiveCycle will show the preview tab.
NOTE: Third-party [non-Adobe] PDF software will not 'play' PDF or XFA forms (this is another related reason the Preview Tab maybe missing)