How to modify the centimeter ruler in Word

In Word, the window default ruler is 2, 4, 6 ... 38, what does this figure mean? is the unit in centimeters? in inches? Not really. It is in characters, which means that in the format of "Arial" fifth, you can enter about 38 Chinese characters per line.

However, such a logo, but not too useful for us, especially in the tabulation, drawing, the character unit is to hinder our accurate mapping, very intuitive, so it is necessary to modify the ruler in centimeters as a unit. How to do this: from the Tools menu, open the Options dialog box, select the "General" tab, there is a "unit of measurement" selection box below the interface, you can not be filled with the "cm" deceived, under it has a check the "use of character units" selection, now the small box of the hook to remove ( As shown, click "OK", return to the word interface to see, the original ruler on the 2, 4, 6 ... 38, has become in centimeters of 1, 2, 3 ... 14 et numbers.