Tab Mode:
Click on the Tab Mode Toggle to switch between tabbed and multi-document view modes.
To make tool visible go to Customize Quick Access Tool Bar and select Tab Mode Toggle.
Synchronize Windows:
Synchronize Windows allows users to compare and edit simultaneously. Several useful views for comparisons and editing are available.
NOTE: In order to synchronize windows make sure Tab mode is turned off.
Network Comparisons (both maps move together)
Matrix Comparisons (browse both matrices together):