jQuery/JS Common - Object Structures - positionConfig - offset
The offset is specified in pixels. To set this property, use an object with the x and y fields. These fields specify horizontal and vertical offsets, respectively. Alternatively, you can use a string value that indicates the offsets separated by a whitespace character. A positive offset shifts the element to the right or down; a negative offset shifts it to the left or up.
In the following code, the overlay element is shifted 50 pixels to the right and 25 pixels up.
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