Answer
ArcGIS uses three environmental variables listed below to support bi-directional display if regional options of operating system is set to Hebrew or Arabic. Using these variables users can control the appearance of bi-directional display. If users do not set these variables, the default values are used.
1) ESRI_RTL (default value: True)
This is the main switch for the right-to-left display.
2) ESRI_RTLUI (default value: False)
This determines whether the GUI is displayed in right-to-left orientation or not.
3) ESRI_TABLERTL (default value: True)
This determines whether the table is displayed in right-to-left orientation or not.
Bi-directional support variables
![[O-image] Bi-directional support variables](https://webapps-cdn.esri.com/CDN/support-site/technical-articles-images/000007974/00N39000003LL2C-0EM39000000wctg.png)