To create a link to a file in Windows, you can go to the Properties menu and copy the Location first. Then, paste the entire file name with the file extension at the end of the location.

You can insert a PDF into Google Slides by converting it into images or creating a link to the same. This post covers both methods in detail.

That can happen. LibreOffice is interpreting the PDF document as a Draw file while you work on it. That can lead to issues, like objects and text boxes placed in the wrong area.

To edit a PDF on Android, download and launch the Adobe Acrobat Reader: Edit PDF app from the Google Play Store. Sign into your Adobe account, then tap the + icon and select Open file.