Dynamic Range Slider

A dynamic range slider is a control used to specify a black and a white point for an image.

There are two forms of dynamic range sliders: the extended slider that lets you set the range from -50% to +150% and the regular dynamic range slider that runs from 0% to 100%. Both types include of a single line of text called a readout that tells you what its current values are. Below the readout is a scale that includes a gray ramp that runs from black to white and below that are black and a white markers you can drag to set the dynamic range.

Here are some examples of dynamic range sliders:

Extended Dynamic Range Slider

Tic marks, if any, displayed below the line indicate the values of the black and white points for the input image.

Regular Dynamic Range Slider

Adjusting Sliders

To adjust the dynamic range, click and drag either the black or white marker to the desired location. You cannot drag them past each other.

If you Shift-Click on the slider, the black point is set to 0% and the white point to 100%.

When tic marks are present, if you Ctrl-Click on the slider, the black and white points are set to line up with the tic marks.

Resizing the transformation dialog box also resizes its dynamic range sliders -- longer sliders are easier to adjust.