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If the
relative shift is significant, it will leave a ???hole??? in the flow, in which case the
rendered box may overlap other content.
The properties top, right, bottom, and left can be used to specify by how much
the rendered box will be shifted. A positive value means the box will be shifted
away from that position, towards the opposite side. For instance, a left value of
20px shifts the box 20 pixels to the right of its original position. Applying a negative
value to the opposite side will achieve the same effect: a right value of -20px will
accomplish the same result as a left value of 20px. The initial value for these
properties is auto, which makes the computed value 0 (zero)??”that is, no shift
occurs.
Evidently, it??™s pointless to specify both left and right for the same element, because
the position will be over-constrained. If the content direction is left to right, the
left value is used, and right will be ignored. In a right-to-left direction, the right
value ???wins.


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