One change from the High Sierra macOS update is a slight modification to the command to print to PDF. Years ago I shared a tip about printing to PDF by holding down the Command key and pressing P twice. It’s a great tip and people still use it. Unfortunately, it doesn’t work in High Sierra. That is because Apple removed the ellipsis from the command. To fix this, go to your keyboard shortcuts and remove the ellipsis, and all will be good again. See the screenshot below and video for help.