Have two computers, a pc and a laptop. Put the monitor for the pc on an elevated surface on the back of your desk, and put the laptop in front and below the monitor. Put the keyboard and mouse for the pc on the keyboard tray, use the laptop’s keyboard and set a mouse for it next to the laptop.
Casually try to type something or use the mouse for one of the systems at random. Better yet, type stuff up on the PC but continually reference the laptop screen for information. Now go to the next page of information on the laptop.