The watch face on your Apple Watch displays when you raise your wrist and hides again when you lower your wrist. You can also wake the screen by tapping on it, which displays the watch face for 15 seconds by default, but this can be extended to 70 seconds.
当您举起手腕时，Apple Watch上的表盘会显示，而当您放下手腕时，表盘会再次隐藏。 您也可以通过点击它来唤醒屏幕，默认情况下，它会显示表盘15秒，但是可以延长到70秒。
If you’re using your watch as a simple flashlight or if you need to refer to something on your watch for longer than 15 seconds, this new wake screen time can be useful. You can change this setting on either the watch or iPhone.
如果您将手表当作简单的手电筒使用，或者需要在手表上停留15秒以上，那么新的唤醒屏幕时间将非常有用。 您可以在手表或iPhone上更改此设置。
To change the setting on the watch, press the digital crown to access the Home screen.
要更改手表上的设置，请按数字表把以访问主屏幕。
On the Home screen, tap on the “Settings” icon.
在主屏幕上，点击“设置”图标。
On the “Settings” screen, tap “General”.
在“设置”屏幕上，点击“常规”。
Then, tap “Wake Screen” on the “General” screen.
然后，在“常规”屏幕上点击“唤醒屏幕”。
The “Wake Screen” screen displays.
显示“唤醒屏幕”屏幕。
NOTE: This screen also allows you to turn off the “Wake Screen on Wrist Raise” setting, which is helpful if you want to put your watch in “theater mode”.
注意：此屏幕还允许您关闭“手腕抬起时的唤醒屏幕”设置，如果要将手表置于“ 剧院模式 ”，这将很有用。
Scroll down to the bottom of the “Wake Screen” screen. Under “On Tap” tap the “Wake for 70 Seconds” option. You can back out of the “Settings” screens by tapping the title at the top of each screen to return to the previous screen until you reach the main “Settings” screen. Whether you back out of the “Settings” screens or not, press the digital crown once to return to the home screen and again to return to the watch face.
向下滚动到“唤醒屏幕”屏幕的底部。 在“轻按”下，轻按“唤醒70秒”选项。 您可以通过点击每个屏幕顶部的标题来返回“设置”屏幕，以返回上一屏幕，直到到达“设置”主屏幕。 无论您是否退出“设置”屏幕，请一次按数字表冠以返回主屏幕，再按一次返回表盘。
NOTE: When you use the digital crown to exit “Settings” without backing out of the screens, the next time you open “Settings” the last screen you accessed opens automatically.
注意：当您使用数字式表冠退出“设置”而不退出屏幕时，下一次打开“设置”时，您访问的最后一个屏幕将自动打开。
To change this setting on your iPhone, tap the “Watch” app icon on the home screen.
要在iPhone上更改此设置，请点击主屏幕上的“观看”应用程序图标。
Tap “General” on the “Settings” screen.
在“设置”屏幕上点击“常规”。
On the “General” screen, tap “Wake Screen”.
在“常规”屏幕上，点击“唤醒屏幕”。
Under “On Tap”, tap the “Wake for 70 Seconds” option.
在“轻按”下，轻按“唤醒70秒”选项。
NOTE: The “Wake for 70 Seconds” option only works when you tap the screen to view the watch face, not on a wrist raise. If you want the watch face to turn off sooner, you can cover the watch face with your palm to turn it off.
注意：“唤醒70秒”选项仅在您点击屏幕以查看表盘时可用，而不是在手腕抬起时使用。 如果您希望尽快关闭表盘，可以用手掌覆盖表盘以将其关闭。
翻译自: https://www.howtogeek.com/234722/how-to-make-the-apple-watch-screen-stay-on-longer/