I'm new to SparkyLinux but I've been a Linux user for a number of years. However, this is the first time I've experienced this problem.
When I try to open a PDF file in File Manager or as an email attachment, the file opens in LibreOffice Draw instead of Document Viewer. I thought I'd find a tab under Preferred Applications but there was none, so I'm very grateful for this forum.
Right click file to be opened and choose "open with". Then be sure box labeled "Set application as default for this file type" is checked and proceed.
Many thanks, I really do appreciate your help ...