Hi Tony, Thanks for the report, I added an internal issue to look into fixing this. From version to version we might update the libraries which parse Markdown, we have also our own functionality which attempts to add some backmapping between the edited Markdown and the HTML preview, I suspect there is a bug on our side. The "DITA" preview looks Ok though. I also notices that in Oxygen's Markdown editor there is some red foreground around one of your links which you made bold:

- **focheck** はサブモジュールとして **[stf](https://github.com/Schematron/stf)** I added an internal issue to have that sorted out as well.

Regards, Radu Radu Coravu Oxygen XML Editor On 8/4/21 19:46, Tony Graham wrote:

Please open:

https://raw.githubusercontent.com/AntennaHouse/focheck/master/README.md

The '<a name="en"></a>' causes Oxygen 23.1 to preview the following text as if it's all <h1>, and the following titles get even bigger.  I don't observe this happening in Oxygen Author 18.1.

Is there a Markdown workaround that still does the right thing on GitHub?

Regards,

Tony Graham.