OpaqueBackground (o) : Existing image is obscured by all parts of the selection.
不透明背景(O):现有图像被选定内容的所有部分遮掩。
2
You can switch from a transparent background (the default) to an opaquebackground, and back again.
您可以从透明背景(默认情况)切换到不透明背景,然后再切换回去。
3
When you use a selection tool, the Transparent Background and OpaqueBackground options appear in the option selector on the Image Editor toolbar (as seen below).