更改星星图层的混合模式为滤色，并降低不透明度到大约20%。
Change the blend mode of the stars to Screen and drop down the opacity to around 20%.
当实时模式选中后将不能改变星图的日期和时间。
When real time mode is switched on, you will not be able to alter the map time or date manually.
如果实时模式被选中，程序将随时间流逝自动刷新星图以达到同步的效果。
When real time mode is switched on, SkyMap will automatically update the map at regular intervals so its appearance matches that of the real sky.
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