> I solved this part on maint branch.
Thank you!
> Sure. Patch welcome.
diff --git a/doc/org-manual.org b/doc/org-manual.org
index ab12fa70a..ea8901f28 100644
--- a/doc/org-manual.org
+++ b/doc/org-manual.org
@@ -6074,6 +6074,11 @@ separator in the latter case, e.g.:
| =11am--1:15pm= | \rArr{} same as above |
| =11am+2:15= | \rArr{} same as above |
+If you do not specify an end time, then you can provide a default
+duration by setting ~org-agenda-default-appointment-duration~ to a
+suitable non-~nil~ value.
+
+
#+cindex: calendar, for selecting date
#+vindex: org-popup-calendar-for-date-prompt
Parallel to the minibuffer prompt, a calendar is popped up[fn:62].
