HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 256

Working with the Character Cell In each font, the basis for each character or space is the character cell. Think of the character cell as a rectangular area around a character that includes blank areas above and to the right of the character. Refer to the Figure 23-5. Figure 23-5 The Character Cell and HP-GL/2 Table 23-5 Term Baseline Linefeed Point Size Description The imaginary line on which a line of text rests. A character's descender (such as the bottom of a lowercase "g") extends below the baseline. The distance from the baseline of a line of text to the baseline of the next character line above or below. For most fonts, the linefeed is about 1.2 times the point size (1.33 times the point size for Stick fonts). Traditional character measure roughly equivalent to the height of a capital letter M plus the depth of a descender. 23-12 The Character Group EN