What should I do if there are black borders on the top and bottom of the full screen ppt?

What should I do if there are black borders on the top and bottom of the ppt screen?

Open the PPT file you want to play.

Click "Design" on the top toolbar to enter the design tab.

Click "Page Setup" in the Design tab to open the page setup window.

In the page setup window, resize the slide and select the appropriate ratio from the drop-down list according to the screen aspect ratio (16:9, 16:10 or 4 :3).

Click "OK" after selecting the display ratio.

Now play the slideshow to see the effect. The black borders on the left and right sides have disappeared.

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