"top": 2, "height": 9 In this case, the rendering engine starts drawing the character from Y-coordinate 2 (index 0) on the sprite sheet. The effective drawing area is from Y=2 to Y=9 (height 7px). This leaves 2 pixels of invisible top padding.
Typically found in:
The top parameter, in particular, is experiencing a renaissance as UI designers demand more control over and color fonts (like COLRv1). Expect to see extended JCFG schemas that support multiple top values for different font axes (weight, width, slant). Conclusion The jcfg font top parameter may seem like an obscure, technical footnote in the vast world of typography—but for those who demand perfection in pixel-aligned text, it is a lifeline. Understanding how to read, modify, and optimize this single integer value can mean the difference between a professional-looking interface and a broken, unreadable mess. jcfg font top