The function of the size attribute in CSS is to set the size and direction of the page box

size properties specify the size and orientation of the page box. There are four values ​​for page size

• auto - The page box will be set to the size and orientation of the target worksheet.
• landscape - Override the direction of the target. The page box is the same size as the target, with the longer side horizontal.
• Portrait - Overrides the orientation of the target. The page box is the same size as the target, with the short side horizontal.
• Length - The length value of the "size" attribute creates an absolute page box. If you specify only a length value, both the width and height of the page box are set. Percentage values ​​are not allowed for the Size property.

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