More checkbox types

It would be nice to have some more checkbox types.


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Is there a Markdown support for that and can you explain the difference between checked and crossed?

The idea behind ‘checked’ and ‘crossed’ is to have tri-state checkboxes, where there is ‘yes’ (checked), ‘no’ (crossed), and ‘not (yet) filled in’ (blank).

I borrowed the checkbox extension from the Zim program (, where we use ‘*’ (checked), ‘x’ (crossed) and ‘>’ (postponed). Since Joplin already uses ‘X’ for checked, I’d suggest to use ‘-’ for crossed (minus also has a negative feel).

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I really like this idea.