Tip:
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To add the shadow box, right click on your image.
Select "Box Setting".
Scroll down and check the "Enable Shadow" box.
Once you have enable it, you will be able to see the shadow surrounding your image.
Click "Adjust" to customize the shadow box.
"Shadow Color" to change your shadow's color.
"Horizontal Offset" shifts the shadow horizontally to the right.
"Vertical Offset" shifts the shadow vertically down.
"Blur" controls the amount of blur on the shadow.
"Size" controls the size of the shadow.
"Transparency" controls the visibility of the shadow.