in the admin_cms/update_content.php and insert_content.php pfile, you need to edit the toolbar array:
$CKEditor_config["toolbar"] = array(
array( 'Source','DocProps','-','Preview'),
array( 'Cut','Copy','Paste','PasteText','PasteFromWord','-','SpellChecker'),
array( 'Undo','Redo','-','Find','Replace','-','SelectAll','RemoveFormat'),
array( 'Image','Flash','Table','HorizontalRule','Smiley', 'SpecialChar','PageBreak'),
('/'),
array( 'Bold','Italic','Underline','Strike','-','Subscript','Superscript'),
array( 'NumberedList','BulletedList','-','Outdent','Indent','Blockquote','CreateDiv'),
array( 'JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock'),
array( 'Link','Unlink','Anchor'),
('/'),
array( 'Styles','Format','Font','FontSize'),
array( 'TextColor','BGColor'),
array( 'Maximize','ShowBlocks'));
this thread has a listing of all the toolbar options:
showthread.php?t=19244