Switch between left-to-right (LTR) and right-to-left (RTL) text direction using the direction buttons in the toolbar.
<richtextbox
name="textDirectionEditor"
toolbar="{bold,italic,underline}|{ltr,rtl}|{justifyleft,justifycenter,justifyright}|{undo,redo}"
height="300px"
html="..." />