求教 DiscWelder CHROME ii DVD按钮图象应如何制作？

sbpsbp

(Next, the Menu Overlay (Subpicture) can be imported as a bitmap file. The Overlay must be a 2 to 4 color (indexed/delimited) bitmap of the same size as the Background Image. The author can create as many custom menu pages (Background Image and Overlay Image) as desired. If the Overlay Image has MORE than four colors or FEWER than 2 colors, a WARNING will appear.

When a Motion Menu (MPEG) is used, the arrival of the Overlay Image may be delayed after the start of the MPEG Background Image.. This delay is set in the "Delay (secs)" box in the Overlay Image area (see above). This delay may not be longer than the duration of the MPEG Background Image file, and the delay time is ignored if the Motion Menu is looped . )

这个是discWelder CHROME ii手册里一段话，我弄不懂2到4颜色的图像是如何制作，麻烦哪个高手具体说说应该怎样制作。我用Adobe Photoshop cs6一个颜色做一个图层，再用3个或6个颜色的图层叠加做成一个图片，导入一直提示颜色不够，用网上下载的图片导入又提示颜色超过。

atuo_H6kKk

不懂帮楼主顶上去~