Hi all, from the current HEAD of the master branch (aa86e4bc), you can use "_" in agendas to filter by effort. This used to be integrated to the tag filter, but filters interaction was then too complex.
You can also use `org-agenda-effort-filter-preset' to set the filter to an initial value in your agenda custom commands. If you want to list only entries with a max effort of 20 minutes : M-x org-agenda t _ < 3 ;; corresponding to the 0:20 effort value Also note that I enhanced the prompt for `org-agenda-limit-entries' (bound to "~" in agenda buffers) which is perhaps not known enough. So if you want to list only entries with a max effort of 20 minutes within agenda entries which sum up to three hours of work: M-x org-agenda t _ < 3 ;; corresponding to the 0:20 effort value ~ E 180 RET Let me know if it works as expected for you. -- Bastien