When saving a slightly edited font in Font Forge I ran the validation check and got a string of errors (not caused by me — they were in glyphs I hadn’t touched). Almost all of them were of the kind “extremal points missing”. Are these errors that I should endeavor to correct? Are they serious in any way?
TIA
El.
Yes, you should always draw your outlines with points on the extrema. It is good habit, and it makes curves much easier to tweak and edit later one (by you or by someone else… if you are using FontForge, you’d probably be OK with other people editing your fonts later on down the line…)
Also, it can play a role in hinting and on-screen rendering. No points at extrema = bad… unless you have a convincing design reason not to put them in a few particular spots… there are always exceptions to rules. But in general, it is good to do.
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