Our interior design projection software,
POGUMAX Designer, includes features for automatic setup on the desired projector.
You can mimic the effect of three-wall projections by connecting three projectors to one computer, allowing you to drag non-full-screen applications from one screen to another.
If you wish to connect three projectors to one laptop (one via HDMI, USB-C, the other via VGA), note that most laptop video cards do not support three active screens simultaneously. You'll need to select any two screens to be active - either one projector with the laptop screen, or two projectors with the laptop screen off.