docs/Features/Subtasks.md
This can happen on old boards: You have Subtasks board missing.
Create new board similar to your original board, but with ^ at beginning and end of your boardname. For example, if your boardname is MyProject, create new board with name ^MyProject^. At keyboard that character is Shift-^-Space.
Set your MyProject board to have subtask board ^MyProject^
Now you are able to create Subtasks to your board MyProject.
In the card's Subtasks section, each subtask now shows its current status — the list it currently resides in (for example To Do, In Progress, Done) — read-only next to the subtask title. When a subtask lives on a different board than the parent card, the list name is prefixed with that board's title.
Several long-standing subtask bugs are fixed in the upcoming release:
^MyProject^ board workaround above on new boards).