How to enable apps at log-in on macOS High Sierra

If there are certain apps that you'll always use the moment you start up your Mac, you can set ‘em up to automatically log-in via System Preferences in macOS High Sierra. 

Login Items.jpeg

Go to Users, make sure your user account is highlighted, then click Login Items. Click the + and you can choose an app, file server or pretty much anything else that should open when you log in. Once you've added something, you can use the checkboxes to opt to hide it, though it will still be running in the background.