The browser zoom-level and Windows Display Scale must be 100%.You do not have to start dragging the crosshair at the exact center, just click anywhere where the mouse pointer turns into a four-way arrow. You can use iCUE to give your mouse different DPI settings to better suit whatever task you are doing.
In Options Click the Point and scroll tab in the left hand corner of the software window.
If so don't worry, the measurement will still be correct and it will reset when you release the button. To change the DPI setting please download Logitech Options.
You can measure the X-axis both ways, select X- to measure from right to left. Sliding the 'Mouse pointer speed' changes the DPI rate for comfortable use.It can also be used to find out what your DPI actually is if you don't have a setting for it in your mouse driver. With this tool you can measure the real DPI of your mouse, and calculate the sensor accuracy.