OptiKey can be made partially transparent so that you can see through to whatever is underneath:
OptiKey 允许半透明设置，因此你可以看到它底部的内容：
- Select the 'Menu' key:
- 选取 “菜单（Menu）”：
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Select either the 'Decrease Opacity' key or the 'Increase Opacity' key:
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在 “增加透明度（Decrease Opacity）” 或者 “减少透明度（Increase Opacity）” 中选择：
When OptiKey is transparent you can see through to whatever is beneath it:
当 OptiKey 透明化以后，你就能看见底部的东西了：
