Here you can set the factor by which the text will be expanded or
compressed when the
Distortion factor, below). Factors higher than 100 % stretch
the text apart, while factors smaller than 100 % compress it.
However you should note that the horizontal elements of a font are affected by this distortion, though vertical ones are not. The width of the font outline therefore becomes less regular, which, thanks to manual correction, is not the case with the image setting fonts from noted font foundries.