Not sure what you mean by proportionall but
you can use spacing to change the horizontal attribute of a font
or character - With the text selected, in the object properties
box there is an icon that looks like dimensioning arrows.
Normally it is 100 percent but you can change it to more or less.
you can change the character to path in the menu bar under text.
Then you can edit the minus sign as art.
> Does anyone know how to make a minus sign that is proportional to a plus sign (+) in bold in Freehand?