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# Font bounding box and character bounding box
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BDF font file has a font bounding box (FONTBOUNDINGBOX).
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This FONTBOUNDINGBOX value indicates that all fonts must have a 3-pixel margin to the left and a 6-pixel margin below the font.
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By providing a FONTBOUNDINGBOX, this can omit the leftmost and bottom blank spaces from the font pattern.
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By providing a FONTBOUNDINGBOX, this can omit the left edge and top and bottom whitespace from the font pattern.
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```
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FONTBOUNDINGBOX 21 26 -3 -6
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```
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