I think the opposite of 'm:val="on" '  is  'm:val="off" ', Powerpoint read  
'm:val="1"' not as  'm:val="on"' but as 'not on' . Howerver Word Can read   
'm:val="1"' as  'm:val="on"'.

在2023年9月12日星期二 UTC+8 09:51:19<Yibotg> 写道：

> Sorry John, the first post is right.
> <m:degHide m:val="on" /> leads the correct root sign 
> and 
> <m:degHide m:val="1" /> leads a blank square on the left of root sign.
> however in docx，<m:degHide m:val="1" />  leads the correct root sign.
>
> I am sorry for my mistake.
> 在2023年9月12日星期二 UTC+8 02:38:16<John MacFarlane> 写道：
>
>>
>> On Sep 11, 2023, at 5:26 AM, Yibotg <yib...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>
>> Sorry , I made a mistake.
>> *<m:degHide m:val="1" /> leads the correct root sign*
>> *and*
>> *<m:degHide m:val="on" /> leads a blank square on the left of root sign.*
>>
>>
>> Well that's good, because pandoc produces m:val="1".
>> Perhaps you have an old version?
>>
>>
>>

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