To show append changes to existing multiline textbox, use below code: <SharePoint:AppendOnlyHistory runat="server" FieldName="multiple field" ControlMode="Display" ItemId="{@ID}"/> How to Add: 1. in custom display form Try to create a new custom display form in Designer, select the multiple field, then go to code, tries to use the above code to replace <xsl:select value-of="@multiple field" /> 2. In custom edit form Try to create a new custom edit form in Designer, select the multiple field, then go to code, try to use the above code to replace <SharePoint:FieldDescription runat="server" id="ffndescription{$Pos}" FieldName="mul" ControlMode="Edit"/>