<p>
Typically, scroll wheel input is used to adjust <dfn>continuous
controls</dfn> such as faders and knobs, or to scroll vertically or
- horizontally inside a window.
+ horizontally inside a window. In most <dfn>continuous control</dfn>
+ cases, holding down the <kbd>Ctrl</kbd> key while scrolling will use
+ "fine" mode and the scroll wheel increments will then be 10% of normal.
</p>