Legacy font support, Default fonts, Automatic kashida insertion – Adobe Photoshop CC 2014 v.14.xx User Manual
Page 716: Ligatures (opentype fonts)

Digit type selection (InDesign panel shown)
Legacy font support
Fonts that have been traditionally used (for example, AXT fonts) can continue to be used in this release of the software. However, it is
recommended that newer Open Type fonts be used for text-based elements.
Missing Glyph Protection (Edit > Preferences > Advanced Type) is enabled by default. Text is handled automatically, where glyphs are not
available in the font you are using.
Default fonts
When you install a Middle Eastern or North African version, the default typing font is set to the installation-specific language, by default. For
example, if you have installed the English/Arabic-enabled version, the default typing font is set to Adobe Arabic. Similarly, if you have installed the
English/Hebrew-enabled version, the default typing font is set to Adobe Hebrew (or Myriad Hebrew in Photoshop).
Automatic Kashida insertion
In Arabic, text is justified by adding Kashidas. Kashidas are added to arabic characters to lengthen them. Whitespace is not modified. Use
automatic Kashida insertion to justify paragraphs of arabic text.
Select the paragraph, and at the lower-right of the Paragraph panel, choose an option from the Insert Kashidas pop-up menu: None, Short,
Medium, Long, or Stylistic.
Note: Kashidas are inserted only in paragraphs with fully justified margins.
To apply Kashidas to a group of characters, select the characters in the document, and then choose Type > Language Options > Kashidas.
Ligatures (OpenType fonts)
With some OpenType fonts, you can automatically apply ligatures to character pairs in Arabic and Hebrew. Ligatures are typographic replacement
characters for certain letter pairs.
1. Select text.
2. In the Character panel, above the language and anti-aliasing menus, click the Standard or Discretionary Ligatures icon.
Discretionary ligatures provide more ornate options that some fonts support.
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