codeofpromo 大佬有话说 :
O365新界面注册表，感兴趣的可以尝试
将下面的保存为.reg格式就好.
Windows Registry Editor Version 5.00
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
"Microsoft.Office.UXPlatform.FluentSVRefresh"="true"
"Microsoft.Office.UXPlatform.RibbonTouchOptimization"="true"
"Microsoft.Office.UXPlatform.FluentSVRibbonOptionsMenu"="true"
不想开启，将true改成false。转载的。
新界面用上了，还行。