Linking between documentation pages

[CorpusCallosum]

Hi, I noticed that some documentation pages automatically generate clickable links to certain classes.

For example this page: https://openframeworks.cc/documentation/ofxOpenCv/ofxCvContourFinder/#show_findContours

Includes a reference to ofxCvGrayscaleImage which automatically generates a link to that documentation page.

But, this doesn't happen all the time for all classes. As another example, this page: https://openframeworks.cc/documentation/ofxOpenCv/ofxCvContourFinder/#show_blobs

Includes a reference to the class ofxCvBlob, but does not link to that class's documentation page.

Why is it that some classes are linked and some are not, and what is the recommended method of adding links between pages?