Preferred width: Sets the width for the selected column. You can set the width in a variety of measurement types including inches (in) centimeters (cn), millimeters (mm), percentage (%), points (pt), pixels (px) or pica (pc). For example, to set the width at one inch, type in 1in, or to set the width at thirty percent, type in 30%.
Previous Column: Sets the width for the column just before the selected column.
Next Column: Sets the width for the following column.