Here's how it can be done in Publisher 2000; it may be the same for your
version.
From the left Tool bar select the line tool.
Draw your line. (You may want to use Tools, Snap to Ruler marks for
placement accuracy)
Selecting the line with your mouse, Format, Line/Boarder styles, More styles
(Select Line thickness, Dashed if wanted and now Color
Lighten to suit.
Don
Vancouver, USA