4 display modes across 3 displays and 2 computers

I have a laptop and a PC and three displays. I need to switch between the computers and the displays and sometimes be working in each computer simultaneously. I have already tried a 4 by 4 by 4 KVM TESmart switch but it only had two display modes. All three monitors for one computer or 1 monitor per computer (Even though I only have 2). I think I need 4 display modes. What I want to be able to do is have all displays for the PC or for the laptop. Or PC Display 1 Display 2 and Laptop with Display 3. Or PC Display 1 and Laptop with Display 2 Display 3. Any ideas would be appreciated.

Question by DoubleB on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.