Type
Type in Adobe Photoshop CS4 consists of vector-based
type outlines—mathematically defined shapes that describe the letters,
numbers, and symbols of a typeface. Many typefaces
are available in more than one format, the most common formats being
Type 1 (also called PostScript fonts), TrueType, OpenType, New CID,
and CID nonprotected (Japanese only). Photoshop preserves vector-based
type outlines and uses them when you scale or resize type, save
a PDF or EPS file, or print the image to a PostScript printer. As
a result, it’s possible to produce type with crisp, resolution-independent
edges.