Step 1: Export to HTML
Content->Export Backup->Export to HTML, select “All”
Step 2: Download and install caliber
Download address: https://calibre-ebook.com/download
Step 3: Convert HTML to e-book
3.1. Click "Add books" to select the HTML file downloaded in the first step.
3.2. Click "Convert books", then select "PDF" in Output format and click "OK"
3.3. After the file is generated, right click and select "Open book folder"
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