How to add a Countdown Timer in PowerPoint | PowerPoint Tutorials - Animation
Step1:OpenPowerPoint>Click“Home”>Click“Add-ins”.Step2:Asearchboxappears.Enter“Timer”or“Countdown”.Step3:Browsetheresultsandclick“Add”ontheoneyoulike.Step4:,Addinganon-screentimerorprogressbarcanaddinterestingeffectstoyourslides.,Addingacountdownt...。參考影片的文章的如下:


