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A font editor is a type of software specifically designed to modify or create font files for use in various applications. They can either create or edit outline or bitmap fonts, or both depending on the software package developer’s intentions. However, most modern font editors deal with outline fonts, as bitmap fonts are more specialized and not as widely used.
Font editors are used to create or modify already existing fonts. They can be compatible with TrueType Font (TTF), Postscript, OpenType and other font formats depending on the software. An easier way of describing a font editor would be that it can be considered a drawing program first and foremost, as it allows the user to draw the outlines of letters, specify angles and implement any other features a developer may have devised. Some font editors allow the user to edit per block or pixel which gives precision, while others approximate the creation rather precisely by using splines, lines, points and paths and then mathematically creating the fonts.
The user creates a lot of “images,” the characters themselves, and then bundles them based on certain metadata or parameters such as distance from each other, angle, width and height. The editor then bundles these into font files that the computer can use.