A superscript is a character, symbol or number set slightly above the normal line of text. It is always smaller than the usual font and is typically found in mathematical or scientific formulas. it is effects to the font.
The other Col# are inactive when you've select 3 columns. How will you activate those boxes?
The easiest way to change and remove tab stops is to work with them directly on the Ruler. We can drag a tab stop to the right or left to shift its position, or we can drag it off the Ruler entirely (up or down) to remove it. To change a tab stop’s type, double-click the tab stop on the Ruler to open the Tabs dialog box and make our changes there.