To make Preview the default app for opening PDF files, the process differs slightly depending on whether you are using a Mac or Windows system: For Mac:
- Right-click any PDF file and select "Get Info."
- In the "Open With" section, choose "Preview" from the dropdown menu.
- Click the "Change All" button to apply Preview as the default for all PDFs.
- Confirm the change in the pop-up by clicking "Continue."
This sets Preview as the default PDF viewer on macOS, opening all PDFs with Preview when double-clicked.
For Windows (especially Windows 10):
- Right-click a PDF file and select "Open with," then "Choose another app."
- Select the desired PDF program (like Adobe Reader, Foxit, or another PDF viewer).
- Check the box for "Always use this app to open .pdf files."
- Click "OK" to confirm.
You can also change the default PDF viewer through Control Panel > Programs > Default Programs > Choose default apps by file type and set the app for .pdf files.
This allows Windows users to set their preferred PDF viewer as the default application for all PDF files. These steps ensure that PDFs will open in the chosen app by default, rather than switching between apps each time a PDF is opened.
