Another suggestion: automatically expand the content of a Body when we create it or activate it. It would make sense for two reasons: you almost always want to see the content of a Body you are working on (at least I do, and having to manually expand it every time is an annoyance); plus, upon creation/activation, it is still selected, so there is no visual cue that it was just activated. With the expanding of its content, with said content highlighted, this would improve noticeability.
Corollary suggestion: when deactivating a Body, collapse its content?
In both cases, it may be judicious to provide the option to disable this behavior.