You can choose a specific font style to replace. For example, you can replace italicized text with bolding. If you choose the Regular option, only plain text will be replaced. Text formatted with bold, italics, or underline will be ignored.
If you do not specify a font style, all text with the specified font and/or font size will be replaced, regardless of what other formatting has been applied to the text.
Since we want to replace all Arial 10 text, you will leave the Font Style field blank.