17 STEPS
1. The first step is to open Magos MASS and click on Menu
2. Next, Click Configuration
3. Click on the Map tab
4. To add a .geojson file, click on the "+" button
5. Optional: Name the overlay
6. Click here
7. Click Upload File...
8. Click Add
9. You can add more overlays as required.
10.
11.
12.
13. Once done, click Apply
14.
15. Click OK
16. That's it! Now the overlay will be presented on top of the map and can be hidden via the layers menu if needed.
17. That's it. You're done.
Here's an interactive tutorial
https://www.iorad.com/player/2581858/How-to-upload-a-geojson-overlay-onto-MASS-
Next step
