Specify kashida length in Arabic text

Do one of the following:

Place the insertion point in the paragraph where you want to change the kashida length.
Select several paragraphs whose kashida length you want to change.

On the Format menu, click Paragraph, and then click the Indents and Spacing tab.

In the Alignment box, select the appropriate kashida length.

Justify Low lengthens kashidas slightly. You can consider this level "normal" Arabic justification. When you click Justify on the Formatting toolbar, the Justify Low attribute is used.
Justify Medium uses wider kashidas.
Justify High uses the widest kashidas.

Arabic text showing three kashida justification levels