This means, e.g., that top top and left right are not valid.
If one value is left or right, then the other value may not be left or right.
Note that: If one value is top or bottom, then the other value may not be top or bottom.If both values are or values, then the first defines X and the second Y. If the other value is top or bottom, then this value defines X, relative to the left edge. If the other value is left or right, then this value defines Y, relative to the top edge. If top or bottom are given, then this defines Y and the other value defines X. If left or right are given here, then this defines X and the other given value defines Y. One of the keyword values top, left, bottom, right.This specifies the X coordinate relative to the left edge, with the Y coordinate set to 50%.Ģ-value syntax: one value defines X and the other defines Y. The other dimension is then set to 50%, so the item is placed in the middle of the edge specified. This specifies an edge against which to place the item. The keyword value center, which centers the image.If three or four values are used, the length-percentage values are offsets for the preceding keyword value(s). If only one value is specified, the second value is assumed to be center. If two non-keyword values are used, the first value represents the horizontal position and the second represents the vertical position. It can be defined using one to four values. A position defines an x/y coordinate, to place an item relative to the edges of an element's box.
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