HM NIS EDIT: Advanced Navigation
Advanced Navigation is a new feature introduced in HMNE v2.0.3. Is the response to the feature request #1105166 made by whyeye. With this new feature you can easily jump to function or macro declaration or open a include file.
Hold down the Control key and put the mouse cursor over the macro/function or include file name, as you can see in the picture below the cursor will become a handpoint, then click and the editor will be positioned in the declaration of the macro or function or open the include file.