3: (Default) The degree of blurring applied to the custom background image is high. The user can barely see any distinguishing features in the background.
1: The degree of blurring applied to the custom background image is low. The user can almost see the background clearly.
2: The degree of blurring applied to the custom background image is medium. It is difficult for the user to recognize details in the background.
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The degree of blurring applied to the custom background image.