Added a To-dos section to each Kanban card. Choose + Add a To-do on a card to add one. It is an ordinary To-do in the board's team, so it also shows in To-dos, and ticking it off on the card or in To-dos ticks off the same To-do.
A card with To-dos shows how many are done on the board, such as "2 of 5 To-dos done". In To-dos, a To-do added on a card, or started from a contact or a Note, has a link to it under its title.