One thing I dislike about Preview.app in Lion is its defaulting to Continuous Scroll as the view option when a new PDF document opens. My recollection is that previous behaviour was for the last-used view state to be honoured subsequently, and I would prefer if this applied in Lion also (my personal preference being for Single Page), or if the default could be changed.
Elsewhere, I have seen reference to a Terminal command which was stated as addressing this, but it does not work for me. The command in question is defaults write com.apple.Preview PVPDFDisplayMode 1 (with a suggested variation of defaults write com.apple.Preview PVPDFDisplayMode -int 1), which is supposed to change the default to Single Page. As I say, this does not work for me, and Preview stubbornly continues to default to Continuous Scroll.
Can anybody help?

~/Library/Preferences/com.apple.Preview.*(e.g.com.apple.Preview.LSSharedFileList.plist,com.apple.Preview.SandboxedPersistentURLs.LSSharedFileList.plist, etc.). Delete them, re-rundefaults write com.apple.Preview PVPDFDisplayMode 1(just to be safe) and then the 'Single Page' mode started working by default all the time. Wish I could answer, but I don't have the rep here yet for a locked question! – Scott Willeke Jul 12 '12 at 19:48