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On Tue, Sep 10, 2019 at 11:57:57PM +0800, Darcy Shen wrote:
> In math mode, I hit \frac, Texmacs will give me the denominator and 
> numerator to fill. Is there a way to tell whether the cursor is at the 
> denominator or numerator using Scheme code?
> 
> If one can, then it is possible to write in Scheme code a shortcut to
>  to jump from numerator, then to denominator, then out of the whole 
> fraction. It would be nice to have such a shortcut.
> 
> reposted from 
> http://forum.texmacs.cn/t/how-to-determine-the-position-of-cursor-in-a-fraction/66

See Help -> Manual -> Editing tools -> Movements inside the innermost tag