Provides a template to render the counter tracking elements of the Content Marker Macro.
The template may contain any formatted HTML content with a placeholder to insert the current value of the element counter.
The template (Def.{}) on the fourth element will be rendered as(Def.4).
In case the Render Counter parameter of the Content Marker Macro is set to 'def', then the space property will be specified as projectdoc.renderCounterElement.template.def.