How to set the photos under Xplay3s6.68 lock screen?

Excuse me, are you talking about the lock screen avatar?

In the lock screen interface, press and hold the nickname avatar with your finger for about three seconds or press and hold the thumbnail to drop it down. After entering the editing state, click the leftmost "+"to change the nickname avatar and personalized slogan! Because the lock screen style is different, the method is also different.

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