Logitech MX 3200 keyboard has Dynamic Search & Zoom which I find completely useless and even annoying as it's easy enough to hit it accidentally.
Luckily it only takes a second to disable it. Simply press FN + Close (Close in a button with X symbol next the Dynamic search and zoom). You will hear a beep and Dynamic Zoom will be disabled.
To re-enable press FN + Doc Flip.
Close and Doc Flip buttons are located on the left hand side of the keyboard next to dynamic zoom slider.