If you’re using your Mac to give a presentation, you might not want everybody to see your messy desktop! If so, you can run a quick command that will hide your desktop icons.

Christmas is coming, and instead of writing out holiday cards by hand, wouldn’t it be easier to just e-mail them to all your friends and loved ones? But e-mail can be so impersonal, at least without knowing the right trick. Here’s a fun trick that can be used to send entertaining emails to people on special occasions, such as birthdays or during the forthcoming holiday season.