A columnview org-columns specification may look like this:

#+BEGIN: columnview :id local :format "%70ITEM(Task) %Effort{:} %CLOCKSUM{:}"

Sometimes you can see variations without the {:} part.

What is the function of {:}?

1 Answer 1


{:} is used to add to the parent nodes a sum of the times for each of the child nodes in the table for that column.

In column views anything in { } is to specify the summary type for that column. : is specifically for times. See SUMMARY-TYPE in the column attributes docs for more info.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.