diff --git a/user_manual/groupware/calendar.rst b/user_manual/groupware/calendar.rst
index 27344f107..32248580b 100644
--- a/user_manual/groupware/calendar.rst
+++ b/user_manual/groupware/calendar.rst
@@ -235,6 +235,19 @@ The ``Empty trash bin`` buttons will wipe all trash bin contents in one step.
 
 .. _calendar-working-hours:
 
+Responding to invitations
+-------------------------
+
+As of Calendar v3.1.0 you can respond to invitations inside the app. Click on the event and select your participation status. You can respond to an invitation by accepting, declining or accepting tentatively.
+
+.. figure:: images/calendar_accept_simple_editor.png
+   :scale: 80%
+
+You can respond to an invitation from the sidebar too.
+
+.. figure:: images/calendar_accept_sidebar_editor.png
+   :scale: 80%
+
 Availability (Working Hours)
 ----------------------------
 
diff --git a/user_manual/groupware/images/calendar_accept_sidebar_editor.png b/user_manual/groupware/images/calendar_accept_sidebar_editor.png
new file mode 100644
index 000000000..82b8e879c
Binary files /dev/null and b/user_manual/groupware/images/calendar_accept_sidebar_editor.png differ
diff --git a/user_manual/groupware/images/calendar_accept_simple_editor.png b/user_manual/groupware/images/calendar_accept_simple_editor.png
new file mode 100644
index 000000000..a5b0e8181
Binary files /dev/null and b/user_manual/groupware/images/calendar_accept_simple_editor.png differ