If the inspector dialog is not showing use the Tools->Show inspectors menu item. To work with templates click on the templates tab of dialog shown
All templates found are listed here. Please note that the export rules of XSLT apply. So only there may be more than one template with the same match and mode details. xsl:param. see below for an example
Clicking on a template entry in the list shown will cause the cursor in the main window to move to the file and line number indicated.