Monospaced versus Proportional

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A monospaced font is a font where all characters have the same width. These fonts are often used to emulate typewriter output for reports, tabular work and technical documentation.

In a proportional font the width of each character, including the space character, varies with the shape of the character. Proportional fonts are easier to read and are preferred for publishing applications.

From proportional to monospaced

To change a proportional spaced font into a monospaced font, follow these steps:

Select the AutoMetrics command (Tools menu) to force the advance width to be the same for all glyphs (except for the second glyph normally called .null - this glyphs advance width should be zero).
If necessary, change the outlines of glyphs that are too wide.
In the Settings command (Format menu) on the Panose tab set Family Kind to 2 (Latin Text) and Proportion to 9 (Monospaced).
In the Settings command (Format menu) on the Header tab make sure the Font Header Flag Instructions may alter advance width is not checked.
In the Settings command (Format menu) on the General tab set Fixed Pitch to a non-zero value (e.g. 1).
Finally in the Tables command (Format menu) you might have to remove two internal tables (if available) hdmx and LTSH. If the font seems to be changed you could also remove the hinting related data, although this will result in a quality decrease.