How to save external pictures of a LibreOffice 6 document inside a file?

Question

libreoffice

Hello! I often save different pages from the Internet in LibreOffice 6 by selecting and copying from the browser. And usually only the text is saved, and the graphics are displayed as links to external sites, which may not always be available. I read that in version 5 it was possible to detach document pictures from the Internet and save them in a file, but how to do this in version 6 is not clear. While I save by printing in a virtual PDF printer, but PDF is not always convenient. Help, how to make in version 6 that external pictures are saved in the document itself?