品牌型号：华为p50 系统：HarmonyOS 2.0.0手机下方按键设置出来需要在设置系统和更新界面中选择导航模式即可。以华为p50手机为例，手机下方按键设置出来步骤为3步，具体操作如下：1点击系统[详细]
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