Locate the code that creates the existing print button. Though the specific code used may vary, the phrase "onClick="window.print ()" " will appear in it (though without the external quotes).

Copy the complete HTML code for the button you want to put in a post on Blogger. Navigate to Blogger and log in to your account. Click the "New Post" button on your Dashboard.

The button HTML element is associated with forms, like a contact form, for example. The PRG Pattern for conserving PageRank works in a similar way to a contact form button.