Properties - General - Overview
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Properties - General - Overview
This page consists of a set of metrics. On the Format menu, click Settings, and then click the General tab.
It can take years before operating systems and software support changes to the OpenType specification. For compatibility reasons it is possible to choose between these versions:
Version 3: Released October 2002.
Version 4: Released May 2008. Added Oblique as additional font style, use typo metrics, and WWS support
Version 5: Released March 2015. Added Size-specific Design Selection Mechanism
This field is used to specify the global information about the font. Press the Edit button to modify this field through the Font Header Flags window.
Units Per Em
Valid range is from 16 to 16384. This value should be a power of 2 for fonts that have TrueType outlines. Nowadays 2048 units per em value is the best value for all fonts of any size including large Latin or non-Latin script fonts.
For OpenType fonts with CFF based outlines it is recommend to set units per em to 1000.
This value is used to convert values in the pixel coordinate system by multiplying them by a scale. This scale is:
PointSize * resolution / ( 72 points per inch * units_per_em )
Smallest read. size
Smallest readable size in pixels. Most fonts have this value set to 9.
Note: Word processors that support OpenType features will probably use the Subscript (subs) and Superscript (sups) features, if available in the font.
The recommended horizontal size in font design units for subscripts for this font.
The recommended vertical size in font design units for subscripts for this font.
Subscript x offset
The recommended horizontal offset in font design units for subscripts for this font.
Subscript y offset
The recommended vertical offset in font design units from the baseline for subscripts for this font.
The recommended horizontal size in font design units for superscripts for this font.
The recommended vertical size in font design units for superscripts for this font.
Superscript x offset
The recommended horizontal offset in font design units for superscripts for this font.
Superscript y offset
The recommended vertical offset in font design units from the baseline for superscripts for this font.
It is up to word-processing software to use these values for superscript and subscript effects. However, be aware that not all software uses these values uniformly, so when the default superscripts and subscripts look correct in one application, they might look wrong in another application. The calculate button calculates the values so that they look correct in Microsoft Word 2010.
The position of the strikeout stroke relative to the baseline in font design units. The value of strikeout position should not interfere with the recognition of standard characters, and therefore should not line up with crossbars in the font. For a Roman font with a 2048 em square, 460 is suggested.
Width of the strikeout stroke in font design units. This field should normally be the width of the em dash for the current font. If the size is one, the strikeout line will be the line represented by the strikeout position field. If the value is two, the strikeout line will be the line represented by the strikeout position and the line immediately above the strikeout position. For a Roman font with a 2048 em square, 102 is suggested.
Suggested values for the underline position (negative values indicate below baseline).
Suggested values for the underline thickness.
Note: Word processing applications decide whether they use these underlinePosition and underlineThickness values or use their own defaults.
Warning: Some Word processors may crash when this value is set to zero.
The amount by which a slanted highlight on a glyph needs to be shifted to produce the best appearance. Set to 0 for non-slanted fonts.