In OneNote you can add a “tag” to any line to add a small element before the text, like checkboxes, prioriity flags, colours boxes, icons etc.

It would be great to be able to categories the items and allow tags to be added to map items, the feature should allow multiple tags to be added.

Currently I am added comments and then changing the colour of the comment to have a “basic” tag experience. however it isn’t pretty and clogs up the comments panel.

I’m not suggesting a straight rip of OneNote, but I think a functionality that provides this kind of experience would fit perfectly in a mind map.