Sync docs with the current configurational interface

doc/index.docbook

@@ -32,8 +32,8 @@ Context menu actions like Rename Bookmarks etc.)
 			<!-- TRANS:ROLES_OF_TRANSLATORS -->
 		</authorgroup>
 		<legalnotice>&FDLNotice;</legalnotice>
-		<date>2021-05-31</date>
-		<releaseinfo>21.08</releaseinfo>
+		<date>2021-08-15</date>
+		<releaseinfo>21.12</releaseinfo>
 		<!-- Abstract about this handbook -->
 		<abstract>
 			<para>&okular; is a &kde; universal document viewer based on &kpdf; code.</para>
@@ -2906,6 +2906,12 @@ Context menu actions like Rename Bookmarks etc.)
 				</mediaobject>
 			</screenshot>
 			<variablelist>
+				<varlistentry>
+					<term><guilabel>Annotation toolbar</guilabel></term>
+					<listitem>
+                                            <para>Allows switching between <guimenuitem>Full Annotation Toolbar</guimenuitem> (<link linkend="annotations-add">default toolbar</link> in the top section of the &okular; window) and <guimenuitem>Quick Annotation Toolbar</guimenuitem> (sliding toolbar with your favorite tools at the right part of the document pane).</para>
+					</listitem>
+				</varlistentry>
 				<varlistentry>
 					<term><guilabel>Author</guilabel></term>
 					<listitem>