Range Slider Interval
Allow the user to select a single value between two range values.
How to Use
Place the range slider on your screen. In the pattern properties, set the minValue, MaxValue and InitialIntervalStart and InitialIntervalEnd.

For advanced scenarios, use the AdvancedFormat parameter. To know how to use this, read the official documentation:
When to Use
Use the Range Slider Interval to enable adjustment of content by predetermined intervals and within a chosen range. Moving the slider along the track, increases or decreases the value. Avoid large ranges (e.g. 1-1000), and small (e.g. 1-3). 
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