A curve is a line graph that shows the response (on the y-axis) to the value of an input (on the x-axis) as that input changes. The Unity Editor uses curves in many components. For more information about using curves, refer to Edit Animation curves.
You can save your current curve as a preset, and organize presets into libraries.
To save your current curve as a preset:
To delete a preset, in the Presets panel, right-click the preset and select Delete.
To replace a preset, in the Presets panel, right-click the preset and select Replace. This action saves your current curve to the preset.
You can save your curve presets to one or more libraries, and move between your library and the default library. Use the More (⋮) menu to create and move between libraries.
Tip: To add the built-in curves to your library, from the Preset panel’s More (⋮) menu, select Add Factory Presets To Current Library.