If you are speculating in futures, you will generally set up an extended desktop, which is a main screen and three split screens. After the home screen opens a window, you can directly pull it to another monitor, click a full screen and it will be fixed there. Open four windows in turn and pull to different monitors. In this way, the contents of each window are displayed independently. You can use the mouse to operate the window contents of the four monitors respectively.
There are many options for graphics hardware now. There are too many professional cards that support 4/6/8 screens, and the game card GTX680 can also support single card 4-screen output. If the budget is not high, take two ordinary 2-head graphics cards and plug them into the motherboard with two PCI-Es. Of course, the premise is that the motherboard must take the N card if it supports SLI, and the motherboard must take the A card if it supports ATI firefight.
The software and hardware of multi-display technology are now very mature. It's quite simple. Try it boldly. As long as your computer reaches the level where you can install a graphics card driver, you will have no pressure.