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OpenType

extend. open type
OpenType is a cross-platform font technology developed jointly by Microsoft and Adobe and is based on Postscript Type 1 and TrueType fonts. Its other advantages are the ability to include an extended character set, which is an advantage for setting type in foreign languages.

See also: TrueType, Postscript Type 1 fonts

Orphan

An orphan occurs when the first line of a new paragraph starts at bottom of a page. This is generally seen as extremely bad typographic practice.

See also: Widow

Overmatter

extend. Overflowed text, reflowed text, over-matter
Overmatter is the extra text that has not fitted into the intended area of a page layout.

When laying out a page, graphic designers will often link a block of text to a blank page. This shows a sub-editor to see how much text has reflowed and allows them to cut the text to fit.