方俊 <heyfng@gmail.com> writes:

> The typical structure as following:
> - [-] root
>   - [ ] b
>   - [X] c
>   - [ ] d
>
> What i want is: if I toggle the root, all checkboxes, including root
> and children, toggled, no matter the children's status are.
>
> Is there native function/command do things like this?

Not from "- [-] root" but from "- [ ] b".

C-u C-u C-u C-c C-c will toggle all checkboxes.

C-u C-c C-c C-u C-c C-c  will untoggle all checkboxes.

HTH,

--
 Bastien