This tab lets you modify the color for each elevation and immediately preview the result.
Modify Elevation: Click on an elevation value to edit it.
Change Color: Click on a color to the right of the elevation to modify it.
Preview: Click Preview to generate a small preview for the current settings.
Rescale: Set a new maximum elevation and rescale all rows.
Drop File: Drag and drop an existing GDAL Color file to the blue square. NOTE - This will overwrite the existing color file!