In a Microsoft Project Gantt Chart, the line separating the time scale from the table portion of the view, and the line between the first two table columns may display differently than they print.

When viewing a Gantt Chart on screen, the line separating the time scale from the table portion of the view is always shown as a solid line, but when printed, the line uses the formatting for the Title Vertical gridlines.

You can alter the format in which this line prints by choosing Gridlines from the Format menu and selecting the desired options.

1. From the Line To Change list box, select Title Vertical.
2. Select the type of gridline you want.

After making a change, the vertical lines between table field names will display correctly. While the line between the time scale and table will not display any differently, it will print in the selected format.

Another effect of changing the gridline type for Title Vertical is that the gridline between the first two columns of your table will also display this same formatting if the first column is locked. Although this line displays the formatting for Title Vertical, it always prints using the formatting for Sheet Columns. You can lock and unlock the first column of your table by choosing Define Tables from the Tables menu, selecting a table from the list, choosing the Edit button, and either checking or unchecking the box for "Lock first column."