https://bugs.documentfoundation.org/show_bug.cgi?id=154756

--- Comment #3 from Regina Henschel <rb.hensc...@t-online.de> ---
The character orientations for style:writing-mode="tb-rl" are correct in
LibreOffice. The "tb-rl" is the writing-mode that is dedicated for vertical
writing of east asian scripts like Chinese, Japanese or Korean. In this
writing-mode east-asian characters are upright and characters from western
languages are turned 90deg clockwise.

You can find a good overview about text directions in
https://www.w3.org/TR/?title=requirements&tag=i18n

But the preview icon in the page properties dialog is indeed wrong. The
direction arrow is correct, but it needs to show upright characters of Chinese
or Japanese, perhaps combined with rotated ABC.

Showing only ABC in 90deg rotated is not suitable, because in addition to
"tb-rl" there will be a writing-direction "sideways-rl" in (hopefully) ODF 1.4,
which will specify a 90deg rotation for _all_ characters.

A text direction mode with characters ABC upright from top to bottom is called
"stacked". Such is currently not a possible value of the style:writing-mode
attribute and is not implemented in LibreOffice. PowerPoint has such "stacked"
text direction for text in shapes.

So the bug here is, that the preview icon needs to be improved.

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