Hello, I'm a Chinese user, in case there may have some problem of explaining suggestions and ideas in Chinese, I will use English. Forgive me for any mistakes in grammar I made.

As far as I know, this product is pretty cool and it's the best office working mouse I ever used before. In the past, my suggestion or dissatisfaction is the UI of application (logitech option). But know, the only problem I found out is -- the position of changing device key. It is on the bottom...... Further more, there is no way to use that function when I try to change other key of this mouse. I really really hope you can improve that. It's so inconvenient to press the button under the mouse. User should have a way to change that function on middle button or anywhere else that can be more easily reached and used.
Best,
Jeffrey Jiang