Select a line of justified text. Go to Type > Insert Kashida and choose short, medium, or long. This elongates the connecting stroke between letters, making the block text look beautiful and even.

: Offers special justification options tailored for Arabic script aesthetics. Adobe Help Center How to Enable ME Content in CS6

Adds decorative elongations to Arabic characters for better justification. Paragraph Panel > Justification

“How?” she whispered.

: Your Character and Paragraph panels will now include icons for RTL direction, digit types (Arabic vs. Hindi), and Kashidas.

If you only have standard CS6, you cannot properly edit RTL text. Your only options:

The keyboard arrow keys behave logically. Pressing "Home" takes you to the beginning of the line—which is the right side of the text box. This feels natural to native speakers.