| Value | Meaning |
|---|---|
| DWRITE_VERTICAL_GLYPH_ORIENTATION_DEFAULT | <summary> In vertical layout, naturally horizontal scripts (Latin, Thai, Arabic, Devanagari) rotate 90 degrees clockwise, while ideographic scripts (Chinese, Japanese, Korean) remain upright, 0 degrees. </summary> |
| DWRITE_VERTICAL_GLYPH_ORIENTATION_STACKED | <summary> Ideographic scripts and scripts that permit stacking (Latin, Hebrew) are stacked in vertical reading layout. Connected scripts (Arabic, Syriac, 'Phags-pa, Ogham), which would otherwise look broken if glyphs were kept at 0 degrees, remain connected and rotate. </summary> |