Merge branch '204-follow-up-from-add-docs' into 'master'

Resolve "Follow-up from "Add docs""

Closes #204

See merge request !282

docs/user/20_overview.rst

@@ -24,7 +24,7 @@ Personal overview for students
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 This menu item provides the student with an overview of the personal notes
-such as tardiness, absences and remarks that teachers hav entered in the class register.
+such as tardiness, absences and remarks that teachers have entered in the class register.
 This enables them to quickly check whether excuses still need to be submitted,
 and to verify what notes have been made about them.
 
@@ -70,6 +70,12 @@ From each entry, you can switch to a detailed view to add specific data.
   :width: 100%
   :alt: List with all students of a teacher
 
+You are also able to create custom excuse types via the menu entry "Excuse
+types". These custom types are also shown in the statistical overview. The
+custom excuse types are also shown in the legend under the students overview
+table.
+
+
 All lessons
 -----------