橡皮用做从当前图层,选区或图像中擦除色块。当在背景图层上使用橡皮时,它将删除色彩区域并用当前背景色代替。而对于浮动图层,其颜色就会被透明代替。对非 alpha 图像也是如此。
不透明度滑条设置该图像操作的透明程度。
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注意 |
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To understand how anti-erasing is possible, you should realize that erasing (or cutting, for that matter) only affects the alpha channel, not the RGB channels that contain the image data. Even if the result is completely transparent, the RGB data is still there, you simply can't see it. Anti-erasing increases the alpha value so that you can see the RGB data once again. |
反擦除选项能在一个图像上进行反擦除。该特性只有当图像有 alpha 通道时才可用。