Learn how to convert text-to-paths so make turn font characters into real shape geometry:
Text Outlines in Visio (http://www.visguy.com/2015/03/01/text-outlines-in-visio/)
Thank you for supporting the idea, that not every little graphic function needs to be done in Visio itself.
I also use Inkscape, whenever Visio is overstrained.
Visio's strengths are not in the graphics, but in its capability to transform data in graphics.
Nice article.
Bitte schön!