Welcome to Adobe Customer Care! Need help? Acrobat. Other Adobe apps. Cancel your trial or plan. Learn how to cancel your free trial or plan. Get started. Change PDF files created in Acrobat 8 and earlier. PDF files containing multimedia content that needs a plug-in or external player to play, rather than the built-in media player. You need to specify a media player to play these files. To do this, press Ctrl + K (Windows) or Command + K (macOS) to open Preferences. Take advantage of this special offer to upgrade to Acrobat DC. Get the world’s best PDF solution – including mobile applications, cloud-based storage, and free updates – at an amazingly low price. Receive a new serial number and installer Get a new serial number and installer so you can reinstall Acrobat 8 successfully. These special If the screen shown here doesn’t match your product interface, select help for your current experience. In the new experience, the tools appear on the left side of the screen. In Adobe Acrobat, follow these steps to view, create, edit, or add a description to document properties or to view object data and metadata. xcjz.