Add functions such as Indent, Outdent, Custom Styles Selector, Custom Links Selector, Font Name, Font Size, Font ForeColor, Font BackColor, ConvertToLower, ConvertToUpper Apply Custom Class Drop Down, Superscript, Subscript, Insert Paragraph, Insert Horizontal Rule, Help, Style Builder, Xhtml Validator, TrackChangesDialog, FormatCodeBlock, TableWizard, InsertSymbol etc.
To see available tools open file: Sitefinity/Admin/ControlTemplates/EditorToolsFileAll.xml.
E.g.
<tools name="DropdownToolbar" dockable="false">
<tool name="ForeColor" />
<tool name="BackColor" />
<tool separator="true" />
<tool name="FontName" />
<tool name="FontSize" />
<tool name="ApplyClass" />
<tool name="InsertCustomLink" />
<tool name="FormatBlock" />
<tool name="FormatStripper" />
</tools>
Copy the required lines to the file: Sitefinity/Admin/ControlTemplates/EditorToolsFile.xml
Now save the file and and open Rad Editor to see the extra tools.