Customizable shape of thoughts
It would be cool to change the shape of a thought (now it is simply a rounded box around the label) based on it's type (in addition to coloring). This would help to visually structure the Brain.

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Erick M commented
Agree with this idea,
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Grik commented
I agree. Shapes that show on screen and in printed output
Sometimes the term mindmap is used with respect to tb7, but I'm afraid I don't think it really qualifies. I love tb7 and also several mindmapping tools. The difference is that in true mind maps you can get a visual hit that engages via images, colours and shapes etc. these are memorable, whereas plexes are great flexible, fast and powerful structures, however the limited ability to show shapes and non-transitory attached images makes for a totally unmemorable view
As a result I support this request -
Karl Hebenstreit commented
The shape could be tied to Thought Types. With Super Thought Types, we could then assign different colors to the 'Child' Thought Types