Markdown documents shown in the WebView2 view now draw fenced mermaid code blocks as diagrams. Mermaid is bundled, so this works offline.

In Markdown and HTML documents, a relative link to a document (e.g. [the manual](./manual.pdf), an .epub or a .cbz) opens it in SumatraPDF. Ctrl + click opens it in a new window. SumatraPDF passes file types it can’t open to Windows (discussion #5924).

The Change Theme window now opens next to the main window instead of on top of it, so you can see the live theme preview on your document.