I'm making a modular variable font and I'm struggling.
I cannot figure out how to correctly set the UPM and vertical metrics.
I have read many posts and manuals (Fontlab, Glyphs, Fontcreator), but I'm not any smarter.
I'm pretty sure I should set TypoAscender 1875, TypoDescender -425, TypoLineGap 0 and also check "prefer typo metrics", right?
(other values are not important in this case?)
But, does for example InDesign use exactly these values? (mainly the LineGap=0?).
I'm afraid it sets the linespacing to 120% of fontsize by default, so wouldn't that ruin my desired spacing?
And how about UPM?
- formerly the dogma was Ascender+Descender=UPM
- is it not needed anymore? Can this be arbitrary now?
What "value" would you suggest? Also please keep in mind that I will probably make a version of this font with denser linespacing (e.g. modulus of 2000 or so):
Of course, I want both fonts to display in apps in the same size (like above) - so I suppose they should have the same UPM (let say 2000) but different Ascender+Descender?