How to make lists in arabic to show from right to left

To create a multilevel list with custom numbering, for example with orientation from right to left, do the following:

   1.   On the Home tab, in the Paragraph group, click the Multilevel List button and then choose Define New Multilevel List...:

   2.   In the Define new Multilevel list dialog box choose the second level:

   3.   Delete formatting up to the first level:

   4.   Add the first level number after second level formatting:

   5.   Create other formatting (see Creating numbered lists).

   6.   Click OK and see new multilevel list.

See also this tip in French: Comment créer la liste numérotée en arabe pour afficher de droite à gauche.