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ADDFTINFO(1) General Commands Manual ADDFTINFO(1)

📛 NAME

addftinfo – add information to troff font files for use with groff

🚀 Quick Reference

Use Case	Command	Description
🔍 Guess font metrics for a new font file	addftinfo res unitwidth font	Reads a troff font file and adds height/depth info, writes to stdout.
📐 Override specific metric parameters	addftinfo -x-height 700 -body-height 1000 res unitwidth font	Manually set x‑height and body‑height instead of using defaults.
ℹ️ Show version	addftinfo -v	Print the version number of addftinfo.
❓ Show help	addftinfo --help	Display usage summary.

📋 SYNOPSIS

addftinfo [-asc-height n] [-body-depth n] [-body-height n]
          [-cap-height n] [-comma-depth n] [-desc-depth n]
          [-fig-height n] [-x-height n] res unitwidth font

addftinfo --help

addftinfo -v
addftinfo --version

📖 DESCRIPTION

addftinfo reads a troff font file and adds some additional font-metric information that is used by the groff system. The font file with the information added is written on the standard output. The information added is guessed using some parametric information about the font and assumptions about the traditional troff names for characters. The main information added is the heights and depths of characters. The res and unitwidth arguments should be the same as the corresponding parameters in the DESC file; font is the name of the file describing the font; if font ends with I the font will be assumed to be italic.

⚙️ OPTIONS

All options change one of the parameters used to derive heights and depths. Like existing quantities in the font file, each value is in inches/res for a font whose point size is unitwidth. Each param-option must be one of:

📏 -x-height

🔤 The height of lowercase letters without ascenders such as x.

📏 -fig-height

🔢 The height of figures (digits).

📏 -asc-height

↕️ The height of characters with ascenders, such as b, d or l.

📏 -body-height

🧱 The height of characters such as parentheses.

📏 -cap-height

🔠 The height of uppercase letters such as A.

📏 -comma-depth

⬇️ The depth of a comma.

📏 -desc-depth

⬇️ The depth of characters with descenders, such as p, q, or y.

📏 -body-depth

🧱 The depth of characters such as parentheses.

addftinfo makes no attempt to use the specified parameters to guess the unspecified parameters. If a parameter is not specified the default will be used. The defaults are chosen to have reasonable values for a Times font.

📚 SEE ALSO

• groff_font(5)
• groff(1)
• groff_char(7)

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groff 1.22.4 23 March 2022 ADDFTINFO(1)

📛 NAME 🚀 Quick Reference 📋 SYNOPSIS 📖 DESCRIPTION ⚙️ OPTIONS 📚 SEE ALSO