diff --git a/components/tachart/fpdoc/tacustomseries.xml b/components/tachart/fpdoc/tacustomseries.xml
index 623297c2fa..ad96fd05cd 100644
--- a/components/tachart/fpdoc/tacustomseries.xml
+++ b/components/tachart/fpdoc/tacustomseries.xml
@@ -10,7 +10,7 @@
         <short>Return number of points in the series.</short>
       </element>
       <element name="TChartSeries.Add">
-        <short>Add new point to the right of the serie</short>
+        <short>Add new point to the right of the series.</short>
         <descr>
           <p>The X coordinate of the new point is calculated as the rightmost existing X coordinate plus 1.</p>
           <p>Requires <link id="TChartSeries.ListSource">editable data source</link>.</p>
@@ -58,7 +58,7 @@
         <short>Series data source.</short>
       </element>
       <element name="TChartSeries.Marks">
-        <short>Mark paramaters.</short>
+        <short>Mark parameters.</short>
       </element>
       <element name="TChartSeries.OnGetMark">
         <short>Called before the drawing of each mark.</short>
@@ -70,6 +70,26 @@
         <short>Series with the data source.</short>
       </element>
       <element name="TChartSeries.Title" link="#TAChartLazarusPkg.TAGraph.TBasicChartSeries.Title"/>
+      <element name="TChartSeries.GetColor">
+        <short>Return the color of the point number <var>AIndex</var>
+        </short>
+      </element>
+      <element name="TChartSeries.SetColor">
+        <short>Set the color of the point number <var>AIndex</var> to <var>AColor</var>
+        </short>
+      </element>
+      <element name="TChartSeries.DefaultFormattedMark">
+        <short>Return the label for the point number <var>AIndex</var> formatted as per <var>Marks</var> property</short>
+      </element>
+      <element name="TChartSeries.Extent">
+        <short>Return the bounding rectangle for all points in the serie.</short>
+        <seealso>
+          <link id="TChartSource.Extent">TChartSource.Extent</link>
+        </seealso>
+      </element>
+      <element name="TChartSeries.FormattedMark">
+        <short>Return the label for the point number <var>AIndex</var> obtained by <var>OnGetMark</var> event, or <var>DefaultFormattedMark</var>.</short>
+      </element>
     </module>
   </package>
 </fpdoc-descriptions>