Great question Jack. Sometimes you may not want to simply print a page but need to include a section in another document. The answer is Yes, you can capture a portion of the visible document as a image to paste into other documents.
These steps are based on Acrobat X and a ATP Navigator powered maintenance library.
1. Make sure the tool-bar is visible. Shift F8 displays the tool-bar and F8 hides it
2. Right click on a empty section of the tool-bar to display a dropdowm menu of other commands
3. Under the Edit menu you will find Take A Snapshot, select this item
4. A camera icon will be added to the tool-bar. Click the camera and the mouse will change to a cross-hair. Click and drag to select the snapshot area. When you release the mouse it will copy the areas image to your clipboard.