---
name: "ftsdf"
section: "1"
platform: "linux"
package: "freetype2-demos"
version: "2.13.3+dfsg-1+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ftsdf"
---

# ftsdf(1)

an SDF viewer

## NAME

ftsdf - an SDF viewer

## SYNOPSIS

**ftsdf** *pt font*

## DESCRIPTION

**ftsdf** displays Signed Distance Fields (SDF) for glyphs of the given font, allowing to change various rendering and display options interactively.

- **pt**

  The point size. Since currently the resolution is always set to 72dpi, this directly gives the ppem value (pixels per EM), too.

- **font**

  The font file to display.