Add box with custom per-page properties

In WordPress these boxes are called “meta box” and to add one to your new/edit page screen you can use add_meta_box() function (look at the example at the bottom for the examples), you can also use this class which is nicely documented and does most of the job for you. Or you can use a plugin like Verve Meta Boxes which does all of the job for you and you just add the options you want form its UI.

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