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The legacy reader skipped `TV`, `Tv`, `Ty` and `TY` of section 15.3.4 of the version 7 file format specification, so type set with `1 TV` opened horizontal. - `TV` sets a text object's writing direction. VectorCraft keeps one direction for each text object, the one in force at its first character, with a warning when a later character has another. - `Ty` marks a Kumi block as a Tate-chu-yoko run, which is VectorCraft's own mapping, and `TY` does the same in horizontal type. A `TY` block in vertical type opens unmarked. Two blocks with nothing between them open as one block. - `Tv` sets Standard Vertical Roman Alignment. All four are modal, and an operand other than 0 or 1 leaves the value as it was. Docs: docs/file-format-parity.md.