make the mx anywhere 3 mouse switch to the same device the keyboard is connected to. if keyboard is paired to PC1, make mouse follow it and also pair to PC1. If keyboard is switched to PC2, make mouse also connect to PC2 etc. Currently you have to turn the mouse over and press the button on the bottom. Why would I want my mouse and keyboard connected to different machines? I wouldn't. They should be linked and controlled by the (easy access) buttons on the keyboard - not by the buttons on the bottom of the mouse.