Right-click-> "Paragraph" before the paragraph, or "Format"->; On the Paragraph, Indentation and Spacing tab, find the special formatting area, then select the first line indentation, and then adjust the number (or length) of characters you want. Generally speaking, one letter is 0.5 characters, and six letters should be three characters.

In addition, the width of English letters is different, and the estimation of "six letters" is only universal. For different letters, the number of empty letters may be different.