Some More Terms Used in Font DesignFont
• A set of typestyles designed to work together.Typeface
• Classification of type into Serif, Sans-serif, Script, Black-letter, Decorative, Brush Script, etc.Typestyle
• Regular, Bold, Italic, Bold Italic, SMALL CAPITALS, Outline, etc.Character
• A letter, symbol, or accent that is assigned a code-point so that it can be typed.Code-point
• A unique number assigned to a character. Glyph
• A graphical outline or letter form.Contour
• A closed curve of one or more that makes up a glyph.Nodes
• Points that define the curves that make a contour. Nodes may be on-curve or off-curve.Composite Glyph
• A glyph composed of two or more other glyphs. A base letter like a, for example, is often combined with an accent or diacritic like ¨ diaeresis) to form a composite glyph like ä (a diaeresis)Composite Glyph Membe
r • One of the glyphs used by a composite glyph or by several composite glyphs. Some composite glyph members may be characters in their own right, or they may simply be included in a font for composing composite glyphs.Offset
• The distance that a composite glyph member is offset vertically or horizontally when used in a composite glyph.Diacritic
• An accentF-unit
• The smallest unit used in font design. Many fonts are designed at 2,048 funits/em. Em-square
• The square within which most letters are designed to fit. Script letter forms or combining diacritical marks may overlap the em-square.
• The arm of the T overlaps the em-square to the right, and the bottom of the italic ƒ overlaps the em-square to the left.
• Four nodes
are selected — two on-curve
, and two off-curve nodes.
• The blue grid is set at 1024 f-units
so four small squares make one em-square
• The composite glyph
ä (a diaeresis, code-point 228) is composed of the glyph
of the character a
(code-point 97) and the diacritic ¨
(diaeresis, code-point 168).
• The right side-bearing
of the italic ƒ is shown as a dotted line.
• The capital T
sits neatly on the baseline
, while the descender
of the italic ƒ descends almost to the Win-Descent
• The space above the glyphs to the Win-Ascent
will be occupied by diacritics
of capital letters like Ä (A diaeresis, code-point 196).