Automatic linking
Double-click the link button 
to automatically link all series from the same study. Identify which series are linked by matching up like-colored link icons (in the top left corner of the frame). Single click to manually add or subtract additional series to automatically defined links
Auto-link State
The auto-link state instructs the viewer to automatically link series together. The default link state is manual. Auto link state persists between viewer sessions. To enable the auto-link state, do one of the following:
Click and hold down the left mouse button on the Link Cursor button, , on the Toolbox toolbar for 2 seconds.
From the Settings menu, expand the Link Property menu and select Auto Link.
From the Link Control toolbar, check the Auto box.
When auto link is active, the Link Cursor button in the Toolbar toolbar changes to 
. To disable the auto-link state, repeat these steps. The button graphic will return to the original image.
Auto link state persists between viewer sessions.