A stepper is a two-segment control that people use to increase or decrease an incremental value.
A stepper sits next to a field that displays its current value, because the stepper itself doesn't display a value.
Make the value that a stepper affects obvious. A stepper itself doesn’t display any values, so make sure people know which value they’re changing when they use a stepper.
Consider pairing a stepper with a text field when large value changes are likely. Steppers work well by themselves for making small changes that require a few taps or clicks. By contrast, people appreciate the option to use a field to enter specific values, especially when the values they use can vary widely. On a printing screen, for example, it can help to have both a stepper and a text field to set the number of copies.
No additional considerations for iOS or iPadOS. Not supported in watchOS or tvOS.
For large value ranges, consider enabling Shift-click to change the value quickly. If your app benefits from larger changes in a stepper’s value, it can be useful to let people Shift-click the stepper to change the value by more than the default increment (by 10 times the default, for example).