Hi ons.othmen,
Thanks for contacting pdf.js express forums,
This is not possible, due to the PDF Specfication.
You can read about the related forum post here:Draw one line between mulitple pages
You do have the option to select using the tool’s API:
https://pdfjs.express/api/Core.Tools.TextHighlightCreateTool.html#select
Best Regards,
Kevin Kim
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