I am not sure if this ability is implemmented or not however when I CTRL V (paste) the screenshot I see only rotating circle. I opened the issue here so you can see what Nextcloud log give me:
When I authorized pdf in etc/ImageMagick-6/policy.xml by
<policy domain="coder" rights="read|write" pattern="PDF" />
Error in log dissappears but the problem that the image is not pasted is still same.
Any help for solution is appreciated