The type size determines how large the type appears in the image. The default type size is 12 points, where one PostScript point is equal to 1/72 of an inch in a 72-ppi image. You can switch between using the PostScript and traditional definitions of point size.

To choose a type size and measurement unit:

  1. In the Type Tool dialog box, select the characters you want to adjust, as described in the procedure To select text.
  2. In the Type Tool dialog box, enter a value for Size. Choose a measurement unit from the menu.

To specify the point size definition:

  1. Choose File > Preferences > Units & Rulers.
  2. Select an option for Point/Pica Size. Traditional points are slightly smaller than PostScript points.