docs(calendar): mention different views

src/public/app/doc_notes/en/User Guide/User Guide/Note Types/Book/Calendar View.html

@@ -18,6 +18,16 @@
         </p>
         <p>The Calendar view of Book notes will display each child note in a calendar
           that has a start date and optionally an end date, as an event.</p>
+        <p>The Calendar view has multiple display modes:</p>
+        <ul>
+          <li>Week view, where all the 7 days of the week (or 5 if the weekends are
+            hidden) are displayed in columns. This mode allows entering and displaying
+            time-specific events, not just all-day events.</li>
+          <li>Month view, where the entire month is displayed and all-day events can
+            be inserted. Both time-specific events and all-day events are listed.</li>
+          <li>Year view, which displays the entire year for quick reference.</li>
+          <li>List view, which displays all the events of a given month in sequence.</li>
+        </ul>
         <p>Unlike other Book view types, the Calendar view also allows some kind
           of interaction, such as moving events around as well as creating new ones.</p>
         <h2>Creating a calendar</h2>