In our example, there are several places where only four spaces separate the second column from the third. Select the entire table. Choose the Replace command from the Edit menu. If you forget this code, just choose Tab Character from the Special menu while the insertion point is in the Replace box. Click Replace All.
Word replaces each sequence of four space characters with a single tab character.
The table after the first Replace operation. As you can see from the illustration above, we're not quite there yet. A few more replaces will take care of repeating tabs and extraneous spaces. Press Replace All. This searches for instances of a tab followed by a space, and replaces this combination with just a tab.