Collapsing enumerations/bullets on certain levels
imo the best way writing informations/knowledge efficiently is using hierachy enumerations/bullets (because 1. every knowledge excerpt can be interprted as an hierachy 2. enumeration hierachy makes use of form stressing content principle).
You can see in the picture Topic 1, Topic 2, Topic 3. Often the text in subpoints is even longer than now and you have more topic points (much more "Information" ).
The problem with this is, that an important thing for understanding is having an overview over things, that are on a same semantic level (good associative). E.g. later and when you look at the document again or generally when you want to get an overview.
So it would be nice to fold/collapse certain bullets, e.g. all bullets of level 1 or 2.