The :left CSS page pseudo-class matches any left page when printing a document. It allows you to describe the styling of left-side pages.
/* Selects the content on the left-hand pages while printing */
@page :left {
  margin: 2in 3in;
}
Whether the page is left or right is decided by the major writing direction of the document. For example, if the first page has a major writing direction of left-to-right then it will be a :right:left page.
Note: You can't change all CSS properties. You can only change the 
margin, padding, border, and background properties of the page box. All other CSS properties will be ignored, and only the page box, not the document content on the page, will be affected.Syntax
:left
Examples
@page :left {
  margin: 2in 3in;
} 
Specifications
| Specification | Status | Comment | 
|---|---|---|
| CSS Paged Media Module Level 3 The definition of ':left' in that specification. | Working Draft | No change. | 
| CSS Level 2 (Revision 1) The definition of ':left' in that specification. | Recommendation | Initial definition. | 
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | No support | 8.0 | 9.2 | ? | 
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | No support | ? | ? | ? | 
See also
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                       Last updated by:
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