Sometimes you may want to use
different sets of TODO keywords in parallel. For example, you may
want to have the basic TODO/DONE, but
also a workflow for bug fixing, and a separate state indicating
that an item has been canceled (so it is not DONE, but also does
not require action). Your setup would then look like this:
(setq org-todo-keywords
'((sequence "TODO" "|" "DONE")
(sequence "REPORT" "BUG" "KNOWNCAUSE" "|" "FIXED")
(sequence "|" "CANCELED")))
The keywords should all be different, this helps Org-mode to
keep track of which subsequence should be used for a given entry.
In this setup, C-c C-t only operates within a
subsequence, so it switches from DONE to (nothing)
to TODO, and from FIXED to (nothing) to
REPORT. Therefore you need a mechanism to initially
select the correct sequence. Besides the obvious ways like typing
a keyword or using completion, you may also apply the following
commands:
TODO
or DONE to REPORT, and any of the
words in the second row to CANCELED. Note that the
C-S- key binding conflict with
shift-selection-mode (see Conflicts). DONE to REPORT in the example above.
See also Conflicts, for
a discussion of the interaction with
shift-selection-mode.