This dialog allows you to set the appearance of the page border. It is accessed when viewing a table by right-clicking the table, then selecting page border from the context menu.

Specify the line style, as described below, then click the table to close the page border dialog and apply your changes.
Style: Specifies the type of line used for the page border (solid, dashed, etc.). Select none to remove the line altogether.
Width: Specifies the weight of the line, from 0 to 6 (with 6 being the thickest available line).
Colour: Specifies the colour of the line.