Notifications.md

@@ -22,7 +22,7 @@ notifications:
 | action   | the action executed on the item | create, destroy, update, import | 
 | as       | the name of the notification itself/the person the notification is for | default, thesis_contact, student |
 | subject  | the subject of the email/notification. Can contain variables (Plaintext) | '%{user} joined your group' |
-| sender   | the email address to send the message from. Can contain variables (Plaintext) | '%{student_email}' |
+| sender   | (optional) the email address to send the message from. Can contain variables (Plaintext) | '%{student_email}' |
 | message  | the message in the email/notification. Can contain variables. Specify either `message` or `message_html`, not both (Plaintext) | '%{coach} accepted your invitation' |
 | message_html | the message in the email/notification. Can contain variables. Specify either `message` or `message_html`, not both (HTML) | '%{coach} accepted your invitation <br> Congratulations!' |
 | setting_group | the group under which the notification will be listed in the notification preferences (Plaintext) | Project, Group, Coordinator |