Recently, when I played the slide show with ppt2010, I found that I couldn't get full screen, sometimes the vertical orientation was full and the landscape couldn't be covered. This problem bothered me for a long time, and finally found out that it was a setup problem. The workaround is as follows:
Open PowerPoint2010 Page Setup (menu "File"--> "Page Setup"):
Set the slide size according to your computer screen size:
Then, try to play the slides again, is it full screen? If not, continue to resize the slides in the above page settings until appropriate.
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