Editing Apple Advanced Typography (section)

{{More footnotes|date=November 2009}}
{{short description|Computer technology by Apple}}
{{Infobox file format
| name                   = Apple Advanced Typography
| icon                   =
| logo                   =
| screenshot             =
| caption                =
| extension              = .ttf, .ttc
| mime                   = 
| type code              = 0100, "ttcf"
| uniform type           =
| magic                  =
| owner                  = [[Apple Inc.|Apple]]
| released               = 
| latest release version = 
| latest release date    =
| genre                  = [[typeface|Font file]]
| container for          =
| contained by           =
| extended from          = [[TrueType]], [[PostScript fonts]]
| extended to            =
| standard               = 
| free                   =
| url                    = https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6AATIntro.html
}}

'''Apple Advanced Typography''' ('''AAT''') is [[Apple Inc]].'s computer technology for advanced [[font]] rendering, supporting [[internationalization]] and complex features for [[typographer]]s, a successor to Apple's little-used [[QuickDraw GX]] font technology of the mid-1990s.

It is a set of extensions to the [[TrueType]] outline font standard, with smartfont features similar to the [[OpenType]] font format that was developed by Adobe and Microsoft, and to [[Graphite (SIL)|Graphite]]. It incorporates concepts from Adobe's "[[multiple master fonts|multiple master]]" font format, allowing for axes of traits to be defined and morphing of a glyph independently along each of these axes. AAT font features do not alter the underlying typed text; they only affect the characters' representation during glyph conversion.