Unfortunately, this is exactly how you get -aligned overlaid characters. It turns out that a diacritic is allowed to have multiple possible attachment points (presumably so combining acute above and combining acute below, etc., didn't have to be different glyphs), and rather than attempt to programmatically decide which one to default to, the FontLab devs appear to have simply forced you to always write it out explicitly. What this means for you is that, in your recipe, you have to follow the diacritic's name with an character and the name of the anchor to align to. In the case of the umlaut, that looks like this: u_umlaut = u + stackingįinally, to attach multiple diacritics above or below a character, you simply need to adjust the location of the appropriate anchor.

This is done by placing a base glyph anchor on the diacritic.Adding kerning is one of the very most tedious tasks in developing a font, if it is done well. It is also the final major production task in type design.Īs I am finishing this stage on the Regular style of my Kickstarter typeface Cristoforo, and about to send updated fonts to my backers, I find myself needing to explain what this kerning business is, anyway. So I thought I would post something here for general public consumption, and point to it from my latest Kickstarter update.

In fonts, each glyph is placed in a slot with a certain amount of space allocated to it, which generally includes white space on either side. The total horizontal space allocated to a glyph is its “advance width.” The distances between the furthest extent of each side of the glyph and the ends of the allocated space are the “sidebearings”-which can even be negative numbers, if part of a glyph sticks into a neighboring space. In high-end type design, spacing is an especially complex art and craft. But many junk fonts don’t even get the basics right, and that is easily detected. Decent spacing is consistent, and follows certain general principles about shapes. Consistency means the “same” elements should get the same space across different glyphs, and similar elements spaced similarly. So the left sidebearings of OCGQ and the right sidebearing of D are all usually either the same or very close.ĭesigning even spacing is about keeping a relatively consistent amount of white space between letters.

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