# Slider

The slider is another special case component, requiring the user to pick a number from a range of numbers by sliding a knob to the correct position. You can specifiy a range of numbers that evaluate to correct.

The Slider is optimized to work best full-screen but if you have a narrow range and only a few numbers to pick from, half-screen works fine.

The Slider component inherits all the settings common to the Presentation Components and all the settings common to the Question Components.

A bit of text that appears above the numbers on the left side. Used to denote what type of “things” the numbers are or what the numbers mean at lower numbers.

A bit of text that appears above the numbers on the right side. Used to denote what type of “things” the numbers are or what the numbers mean at higher numbers.

The first and lowest number in the scale. Can be an integer or a floating point number (has a decimal).

The last and highest number in the scale. Can be an integer or a floating point number (has a decimal). In case it’s not obvious, the scale *must* go from low to high and cannot be reversed.

A positive number representing the amount the scale should increment by. Scale step can cause issues if the steps in the scale are not proportional. In math terms, the Scale end number must be `Scale Start + ( number of steps * Scale Step).`

For example: If you have a Scale Start of 1 and a Scale Step of 3, Scale End must be 4, 7, 10, 13, 16, etc. In the above example, if you had an Scale End of 12, the scale would be clipped at 10.

The numerical value of the correct answer. This field should be left blank if you want to allow a range of correct answers.

The numerical value of the beginning of the correct range. This number is *inclusive*. This value is ignored if the Correct Answer is not blank.

The numerical value of the end of the correct range. This number is *inclusive*. This value is ignored if the Correct Answer is not blank.

If enabled, the indicator on the scale will show the number.

If enabled, there will be an indicator on the scale itself that displays the selection.

Determines whether the scale is displayed.

The Slider component is particularly useless without the **Show Scale**, and to a lesser extent **Show position indicator** and **Show number on indicator**.

From what we can tell, these options exist to allow for custom styles that developers can create outside of the Adapt Authoring tool.