User`s manual

Conversion Process
85
The Level of automatic hinting pop-up menu is used when an
OpenType PS font is generated. Autohinting is not needed when
conversion from Type 1 format is performed. All old hinting information is
preserved in this case. But when conversion from TrueType is performed,
there are two ways to deal with hints:
1. To not generate hinting information in a new OpenType PS font: Select
No Hinting in the Level of autohinting pop-up menu. The font will
be unhinted in this case.
2. To use special autohinting algorithms that convert TrueType
instructions into Type 1 hints: Select Default Level item in the Level
of automatic hinting pop-up menu. This option is set by default.
Note: TrueType hinting options (the Generate TrueType/OpenType
Page of the Preferences dialog) will be used when conversion of a Type 1
font to OpenType TT (ttf) font is performed.
When producing OpenType fonts you also should check other options like
Perform optimal conversion method if possible in the General
Conversion Options, or Group OpenType TT/PS fonts by Alternative
Family name in Font Families Packaging.