打印HTML文档总是会出现问题。在CSS2中，我们可以借助打印属性让打印web内容更容易一些。
| 属性 | 描述 | 值 | W3C |
|---|---|---|---|
| orphans | Sets the minimum number of lines for a paragraph that must be left at the bottom of a page | number | 2 |
| marks | Sets what sort of marks should be rendered outside the page box | none crop cross | |
| page | Sets a page type to use when displaying an element | auto identifier | 2 |
| page-break-after | Sets the page-breaking behavior after an element |
|
2 |
| page-break-before |
Sets the page-breaking behavior before an element |
|
2 |
| page-break-inside | Sets the page-breaking behavior inside an element |
|
2 |
| size | Sets the orientation and size of a page |
|
|
| widows | Sets the minimum number of lines for a paragraph that must be left at the top of a page | number | 2 |