The writing mode a CMap selects for the glyphs of a composite font: which metrics position them.
public enum WritingMode
ISO 32000-2 §9.2.4 and §9.7.5.1; the CMap's WMode (§9.7.5.3, Table 118; Adobe TN 5014 §5.2).
kind:method, kind:property, kind:ctor. Press Esc to clear.HorizontalHorizontal writing (WMode 0): glyphs advance by their widths, w0 (§9.7.4.3 W, DW).VerticalVertical writing (WMode 1): glyphs advance by w1 and are placed by the position vector v (§9.7.4.3 W2, DW2).