How to reset the Finder to its default settings? Can the Finder be reset to all original Default Settings?
Note there is a specific motivation:  I no longer can view external DVD/CD drives from Finder even though they both can play movies/music CD's: see DVD/CD Drive no longer shows in Finder .  Resetting to Defaults would just be another thing to try.
To restore the Finder to its original state, you should enter this command.
rm ~/Library/Preferences/com.apple.finder.plist; killall Finder