In sliders where the track is small compared to the number of steps available in the range, it is often difficult for end-users to set the exact value they desire. This is because the value is derived from the thumb position on the track and sliding the thumb of a small slider, even minutely, can result in adjustment of a few steps.

In order to improve end-user experience, the uiSlider from the Aspire UI library (v1.1.5+) implements mouse wheel support. When a uiSlider instance has focus, the end-user may hover the mouse over the instance and use the mouse wheel to adjust the value up or down step-by-step (by moving the mouse wheel up or down). This is implemented on top of the usual keyboard support (UP and DOWN keys).

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