ဤထိန်းချုပ်မှုကို ပြင်ဆင်ခြင်းဖြင့် ဤစာမျက်နှာကို အလိုအလျောက် အပ်ဒိတ်လုပ်ပေးပါမည်
![](https://help.apple.com/assets/66E20C11AAB692A44803F303/66E20C12A39D218AA90A13A6/en_US/530c85a3f10678e47ca4a56f0a580b22.png)
Change a window’s background color in Preview on Mac
Preview shows a gray background behind PDFs and images. In a PDF or image, you see the background if you expand the window larger than the size of the document; in an image, you can also see the background through any transparent sections. You can change the background color.
Go to the Preview app
on your Mac.
Choose Preview > Settings, then click General.
Click the “Window background” color well, then choose a color.