Hidden settings with defaults

Customise Finder, Dock and screenshots.

1. Show hidden files in Finder (or ⌘ + Shift + . on the fly):

   defaults write com.apple.finder AppleShowAllFiles -bool true && killall Finder

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2. Auto-hide the Dock:

   defaults write com.apple.dock autohide -bool true && killall Dock

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3. Save screenshots as JPG instead of PNG:

   defaults write com.apple.screencapture type jpg

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4. Speed up key repeat:

   defaults write NSGlobalDomain KeyRepeat -int 2

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5. Undo a setting by deleting it:

   defaults delete com.apple.dock autohide && killall Dock

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