Youre usually not actively using the mouse. You set up each window/module individually, on a normal set up, then when you get into a control room, you load them individually and fit them to a monitor to just look at. Theres probably 1 or 2 monitors that hes actively using. I see no actual test control equipment in the picture, so they likely have some communication method to the people with the actual controls.

Like for example, if this guys monitoring oil systems, hell be checking levels, pressure, temperature and all things bearings, hes likely got an entire set up to monitoring just the oil tanks, one for oil flows at different locations in the circuit, specific temperaute locations so that he knows if he has risk of ignition, those kind of things. If he notice oil tank levels getting low, he'll call for more oil. Someone else has the job of controlling the valves and refilling the oil. If it goes on too long, he can call out he suspects an oil leak, which could lead to a different operator throttling back on the engine, or even turning it off. If he sees that his bearing is over/under loaded, he can call for a different person running an air system or a completely different person running a gear box to load/unload the bearings.

If theyre not all in the same room, theyre usually on phones, walkie talkies, or instant messenger

You.. move it? And.. click?