Private Use areas - Vertical Text

[WORDINGHAM RICHARD via Unicode]

> 
>     On 29 August 2018 at 13:05 Andrew West via Unicode <unicode at unicode.org> wrote:
> 
>     I tested with Word 2007, and normal PUA characters from my font were
> 
>     displayed with vertical orientation in a vertical text box, but Plane
>     15 PUA characters were rotated.
> 

And then the original question is whether a font can suppress this rotation.  For example, it is entirely possible that the rotation could be eliminated by the vrt2 OpenType feature mapping a Zhuang PUA glyph to an identical glyph.

Richard.
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