There are lots of new things in the upcoming Catalina OS from Apple including a few new tricks for the Safari web browser. One addition to Safari is called “Move Window Left/Right Screen”. This command uses the macOS Windowing function that has been available for the last couple of macOS iterations. Here is how it works.
Safari Move Window
Obviously, the “Move Window Left/Right Screen” command is used when you have more than one Safari window open in your workflow. Here is an example of two Safari overlapping windows open at the same time:
To separate these two windows so they are not overlapping you use the move window command in the “Window” menu item:
In this case we moved the top most window to the left-side of the screen:
From this point there are several choices. You can click on “Merge All Windows” under the Window menu to bring both windows into one window with two tabs. When you do this it goes to full screen. To get out of full screen just click on the green button top left corner of the window.
If you close one of the windows the remaining window moves to full screen. Click on the green button to get out of that or hit the ESC ⎋ button.
This is not exactly earth shattering news, but if you occasionally work with multiple windows in Safari, it may assist your workflow a bit.