ow="scroll">

                <mrow>
                    <mi mathvariant="italic">start</mi>
                    <mo>+</mo>
                    <mi mathvariant="italic">x</mi>
                    <mo>-</mo>
                    <mn>1</mn>
                </mrow>
            </math>,
            inclusive.  This region may not include any
            entries outside the range of the color table, as was originally specified.
            It is not an error to specify a subtexture with width of 0, but such a
   