MultiViewer allows you to position windows in whichever way you like. Open the streams and live timing windows you want, drag them around, resize them, and when you're happy, open the main window again. At the top of the stream list, the "Save setup" button is now enabled. Give your setup a name, or if you had setups before, you can update an existing setup if you want to.

Next time, press "Open setup" to re-open the same setup. MultiViewer opens every window you had open (players, live timing, track map, race trace, race control and the rest) and restores their position and settings as they were.

You can optionally edit your setup file by hand. It's a JSON file, and MultiViewer saves a JSON schema next to it and references it from the file itself. Next to the "Open setup" button, there's a button to reveal this file. Use VS Code or any other editor with JSON schema support, and your editor will flag mistakes as you type and show descriptions on hover. MultiViewer itself doesn't check the file when it loads, so if you save something invalid you won't get an error, your setup list will come up empty. We don't offer support for creating setups this way.