If PDF Expert doesn’t respond or freezes, select your case and follow the steps to solve this issue straight away, or get help from our Support Team.
Try restarting the app by clicking Force Quit in the Apple menu or on the app's icon in the dock and if it doesn't help, send us an email to email@example.com. In your message, describe the issue you are experiencing with PDF Expert.
Note: The steps are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn't.
Try opening this file in the Preview app - this is a standard macOS viewer that uses the same system component as our app.