The options for the Gallery have been given as just widths, heights, perrow, and caption. However, various true CSS properties and values can be used within the gallery tag also. For example, style="color:maroon;'' to change the font color.
The properties tested include the align, border, padding, letter-spacing, background, text-align, color, font-family, font-size, font-weight, and font-style. The syntax for the picture mask remains a mystery.