Go to Tools -> Options -> Language Settings -> Languages
. Check Show UI elements for Bi-Directional writing
. Then under Default languages for document
, specify the CTL language as Persian. Click OK.
Now go to Tools -> Options
again. Under Language Settings
, it should now be possible to select Complex Text Layout
. Select Context
in the drop-down list.
With those settings, entering numbered right-to-left text will use CTL numerals.
Note: In LibreOffice, the Languages menu looks a little different. In that menu, instead of Show UI elements for Bi-Directional writing
, the relevant check box is labeled Complex Text Layout (CTL)
.