Q&A for How to Check Mouse Sensitivity (Dpi) on PC or Mac

Using a DPI analyzer and a mousepad with exact inch increments drawn below the mouse, configure the analyzer to travel the exact distance you wish under a DPI close to the current DPI you have configured. The analyzer will keep track of the exact DPI you are using. Google an analyzer but be careful to avoid downloading any malicious software. The analyzer should be embedded on the website.

Click the Apple icon in the upper-left corner of your screen. Select System Preferences... from the dropdown menu. Click on Mouse in the System Preferences window. Click the Point & Click usually located in the upper center screen. The Tracking Speed slider value is going to be the value you’re looking for or to set.

That's not possible until you actually have a branded mouse which hosts a software that can show you your dpi (exact digits) and change them. Windows has no function that shows your exact dpi. You have to check the manufacturer’s specifications

"BMP, "PNG", "JPG", and "GIF" are common file formats. For most situations, PNG will yield the smallest file size without losing quality. Choose JPG if the image being saved is a photograph, though note that Paint's implementation of the jpeg standard results in glossy images.

Power on your Windows Vista computer. If your computer is already turned on, click on the Start menu and select “Restart” from the drop-down menu next to the Lock button.