In order to take notes, there are two forms of note-taking, which are useful for different things. As linear notes are written down a page with headings and subheadings, they need plenty of room for detail. On the other hand, spider diagrams (spidergrams) are on one page and are good for showing structure and organising your ideas. They are good for making connections clear and visual and they are also called mindmaps.
Some students do not like spidergram note-taking, although it has a number of pros, for example, they keep notes on one page, show the main points at glance and keep points grouped together. They clearly show the gaps which need more research.