When I highlight/select several lines with check boxes in the markdown editor and right click> Toggle Checkbox I expected all of the selected lines to be toggled.
It's true that the menu item does say "checkbox" singular. But it seems like selecting multiple lines should work.
I am also interested in this possibility.Unless I'm mistaken, the Toggle checkbox entry is a function added by the Rich Markdown plugin. So I asked on the plugin topic.
There is also the solution of the Reset Checkboxes plugin, I just asked the developer if it was possible to reset the checkboxes of a selection and he just added the function, a big thank you to him