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2) Rotate ENTER knob to move the cursor to Replace, then press the knob once again.
3) Then the cursor will automatically jump to USB files on the left side. Rotate the ENTER knob to
select one background source in the U disk, and then press the knob once again to replace.
3.5.3 Adding Layer A
1. Push Layer A Button on the front panel to edit Layer A. This operation simultaneously enables
Layer A.