Many of the variables, imports/includes, and templates can be navigated to using the Open Declaration (F3) popup menu option. They can also be navigated to directly by CTRL-Clicking on the name of the variable, import/include, or template. Items that currently have hyperlinking navigation are:
Called-Templates
hrefs for Import and Includes
With-Param variables
The hyperlinking ability will navigate you to where ever the first definition of the template is defined. So if the template is defined within the current stylesheet it will navigate to that definition. However if it is defined in an imported or included stylesheet, or any of those imported or included stylesheets it will take you to that definition. Use the standard navigation errors to move back and forth during this hyperlinking.