In the bug 1695816, [section 5 of UTR #50 (Glyphs Changes for Vertical Orientation)](https://www.unicode.org/reports/tr50/) has been partially supported. However, this table does not fully support the "5 Glyphs Changes for Vertical Orientation" in UTR #50. I am not sure what criteria was used to select the characters to create this table. For more complete implementation, the table should be updated or UVerticalOrientation from ICU should be used.
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In the bug 1164835, [section 5 of UTR #50 (Glyphs Changes for Vertical Orientation)](https://www.unicode.org/reports/tr50/) has been partially supported. However, this table does not fully support the "5 Glyphs Changes for Vertical Orientation" in UTR #50. I am not sure what criteria was used to select the characters to create this table. For more complete implementation, the table should be updated or UVerticalOrientation from ICU should be used.