What are the steps to apply a page border with double line style border that is 3 pts and check that the margins of the page border have a 24pts margin and starts from the edge of page?

To apply a double line style page border with a thickness of 3 pts, go to the "Design" tab in your document editor, select "Page Borders," and choose the double line style option. Set the width to 3 pts and ensure that the margins for the border are set to 24 pts. To confirm that the border starts from the edge of the page, adjust the "Margin" settings in the Page Borders dialog to "0" for all sides or check the option that specifies the border starts from the edge. Finally, apply the settings to see the changes reflected in your document.