automatic card flatten or split

[brainchild0]

I have not found any features that automatically modify the tree structure without affecting the text sequence, though it might prove useful to be able to do so in certain cases.

A few basic cases might be:

• Flatten card and descendants into a single leaf (while preserving text).
• Move each subsequent paragraph into a child card, keeping only the first in the target card.
• Generate card hierarchy from the section hierarchy contained in a single card. (Useful for integrating text from other sources into a document.)