Some applications I want to remember which documents were open when I quit, but never Preview. To prevent it from opening unwanted documents at launch, you can enter this command in Terminal: defaults write com.apple.Preview NSQuitAlwaysKeepsWindows -bool false Another good candidate for this treatment is: defaults write com.apple.QuickTimePlayerX NSQuitAlwaysKeepsWindows -bool false Preview opens every PDF … Continue reading Preview Regressions in Lion