How to combine two computers into one workspace?

Question

Monitors

Hi all. I have such a task. There are two laptops. I connect a monitor to one of them. But is it possible to connect the monitor of a second laptop so that there is an extension of 3 screens, so that, roughly speaking, you can move the mouse from monitor to monitor without changing the mouse itself. Used to work in 2 monitors but now I still need to see a third monitor for Skype and other messengers.
PS Both laptops are in the same LAN.

Answer 1

As a Synergy option

Answer 2

To use the screen of a second laptop with the same mouse and keyboard, use synergy-project.org/download