Here it is about the categories and their dedication, not about the rules that are also known by far too few. Each category and subcategory has a topic after the naming scheme “About the XYZ category”, and this is the one of the → sketchbook category. But the main categories also describe on the forum’s homepage for what they are for, one should enjoy one’s life with open eyes, then one has more of it. 
But far too many live this life → 
Michelist