In this example, we are using a top and bottom Master border.
Create a text object on your layout
On the text box properties menu - size layout to text and contents wrap to browser width-, click "Format" Example 1
Choose Border and change the highlighted section to your preferences- only apply border to "right" and "left". Example 2
Create another text object in the top master border and complete steps 2 & 3 but uncheck the "bottom" border and check the "top" border. Example 3
Create still another text object for the bottom master border and complete steps 2, 3, & 4 but uncheck the "top" border. Example 4
Insert the graphics, etc. that you want to appear in the top and bottom master borders.
The page border created above will look like this page. Now on to a more simpler method- Zero Margins - but you will loose the master border functionality BUT using Server Side Includes can cure this issue!