Keep your screen your own.

Guides to locking your Mac fast and keeping what is on screen private, wherever you work. Each one solves the problem first; Shoji is mentioned where it helps.

Screen privacy and locking

How to lock a Mac screen instantly: shortcut, hot corner, Touch ID6 min Require a password immediately after a Mac sleeps5 min Hide personal details in a screenshot before you share it on a Mac6 min Setting up a Mac you will travel with6 min Blur everything except the window you are working in on a Mac6 min Hide Slack, Messages and Mail when someone walks up to your Mac6 min Leave a note on your locked Mac screen for whoever walks by6 min A privacy filter for a MacBook: physical screen or software?6 min What happens if someone force quits a Mac screen locker6 min Why the macOS lock screen is slow for short breaks6 min