How to change the lock screen desktop win10?

win10 lock screen desktop pictures can be replaced by default, some friends may not know where to change, you can see the following operations:
first open the start screen (I also use the official statement ~), select all applications (if Opened before, will be the same as my screenshot, there will be directly on the above

Then find the computer settings, enter the computer settings interface (this interface is different from the control panel, only some computer shortcut settings)

After clicking the lock screen interface to enter the settings, or click on the left computer and device —— lock screen interface, set
enter, click on the column below to replace

Or click the browse button below to set the lock screen via local image