You can easily copy content in Reader unless the PDF author has applied security settings that disallow copying.
If you receive a password-protected PDF, use the designated password to open the document. Some secured documents have restrictions that prevent you from printing, editing, or copying content. If a document has restricted features, any tools and menu items related to those features are dimmed in Reader.
If you have trouble opening a PDF, or if you are restricted from using certain features, contact the author of the PDF.
The Snapshot tool copies an area as an image that you can paste into other applications.
Choose Edit > Take a Snapshot.
Drag a rectangle around the area you want to copy, and then release the mouse button.
Press the Esc key to exit Snapshot mode.
In another application, choose Edit > Paste to paste the copied image.