It helps us if you tell us your distribution etc. (Hint: Edit your LQ Profile!)
Are you using KDE? I am assuming so....
K->System->Configure your desktop(Or similar)->Components->File Associations.
Put "pdf" in the "Find filename pattern" box.
Open the Application box below, select pdf.
In the right pane you will see the filename patterns *.pdf
, because linux is case-sensitive.
In the box "Application Preference Order", select the application you wish to be the default for that filename extension. For you it will be Acrobat. Now click the "Move up" button until Acrobat is at the top of the list.
Click "Embedding", Select "Show file in separate viewer".
Click Apply, click OK.
That should do it. If, for some reason, it cannot find Acrobat when you try to open a *.pdf, KDE is supposed to try the next application in the list.
If Acrobat is not listed for you to click on and move up the list, you'll have to add it by clicking the "Add" button, and then give the path to your PDF reader.
What is the difference between "open with application" and "open with view" ?
Eh? Please be more specific.