Preferences questions

Recent items menus have stopped working on my iMac
macos imac preferences
How to disable Mojave’s desktop tinting (with reduce transparency)?
preferences ui mojave
How to use plain text smileys (disable automatic emoji substitution) in Messages.app?
messages preferences macos emoji
Is there a way to export syntax color settings from one Xcode installation to a new one?
data-transfer xcode settings color preferences
How to increase "tracking speed" beyond the maximum?
mac macbook-pro preferences trackpad
Set default mail client in OSX without adding an email account?
macos mail.app ms-office preferences
How to extend the time that a screenshot remains on screen on macOS Mojave?
screen-capture preferences mojave
Why are my plists in ~/Library/Preferences accompanied by a matching lockfile in Lion?
macos preferences
System-wide finder view preferences
macos snow-leopard mac finder preferences
iTunes opens automatically when CD inserted
itunes preferences
Open Preference Pane from command line on El Capitan (Mac OS X 10.11)
macos dock preferences
How do I get F11 and F12 to behave like normal function keys?
macos keyboard system-prefs preferences
Restoring iTerm2 to default values
applications preferences iterm macos
How can I add new folders to the Favorites in the Finder sidebar?
macos finder preferences customization sidebar
Where can I find a list of Apple preferences/plist files & what they're used for?
preferences plist
How do I set a custom avatar for my account profile in Mountain Lion?
macos user-account preferences
Two entries for Google Chrome in Notifications preferences
macos google-chrome notifications preferences
How to change tap to click using "defaults write" from command line?
command-line preferences defaults
Can I disable Dashboard in Mountain Lion?
macos terminal preferences dashboard
How to disable frequently visited items and favorites under the address bar in Safari 8?
safari macos preferences