Answered
In our previous version, Acrobat Pro 7 when I open 3 or 4 pdf files it would open all the files in the same window and I could use Ctrl +Tab to switch between the files like in almost any other program.
Now with Acrobat Pro 9 when I open 3 or 4 pdf files I get 3 or 4 open Acrobat windows respectively.
I cannot find anything about this in the Preferences or in the help file.
I am using Windows XP Pro.
Any ideas?
http://blogs.adobe.com/acrobat/2008/09/mdi_vs_sdi_in_acrobat.php