Windows has a default setting for how far the page moves when you move the scroll wheel on your mouse. For most people, this amount feels perfectly normal. However, some people want to configure their scroll wheel to move the screen more or less, per scroll of the mouse wheel. Windows includes support for configuring just that.
To change the behaviour of the scroll wheel, press the Windows key, type “Mouse” and hit Enter. This will open the Settings app on the mouse configuration page. By default, when you roll the mouse wheel, Windows scrolls down three lines of text. You can change how many lines of text are scrolled past with the slider on the page. When you click and drag the slider, a number will appear. You can choose a value between one and one hundred lines.
Tip: Be careful about setting it too high – your screen will jump quite far and you’ll struggle to navigate normally.

The best way to configure this so it feels comfortable to you is to open up a long web page or document in the background. You can then choose a setting and test it straight away.
An alternative option is to not use the measure of a number of lines at all. With the drop-down box labelled “Roll the mouse wheel to scroll” you can select “One screen at a time”. This scrolls almost the entire height of your screen up or down when you roll your mouse wheel.
Tip: There isn’t any apply button, as soon as you click an item, the setting will be applied.
Barry Oliver says
No it didn’t !!!!
I want to permanently change the default number of lines (3) for scrolling with the mouse but the change only lasts for the session I am in – as soon as I reload the PC it reverts to 3.
I cannot understand why such a simple thing seems to be beyond the capabilities of a supposedly sophisticated computer company such as Microsoft !