Adding or deleting text above the line will not affect the position. As you make changes in the dialog box for lines, a graphic sample line appears in the dialog box illustrating the effect. This display is quite helpful. The line will run from the top to the bottom margin at the insertion point location. Left Line is at the left margin.
Right Line is at the right margin.
Centered Line is centered between the left and right margins. Column Allows you to indicate after which column aligned to place the vertical line. You must be inside a column area for this to work. Top Starts the line at the top margin. Bottom Starts the line at the bottom margin.