Excel substituting font size - or is windows messing it up?

[bbrother]

I have a userform with many labels and controls. I have noticed that the font is arbitrarily substituted at times. For example, all of my labels are in Tahoma 10 font, but some of the labels appear in slightly smaller / finer text than others. In fact, I caught VBA changing the font red handed when simply moving a label backwards on a form so I could position it just right next to an input box.Is this some kind of True Type thing where sometimes the font traverses pixels and lights more up? It's a little annoying and I'd rather take more care in placement then to let windows/vba arbitrarily decides when it wants to substitute a font.If someone could explain what's happening, and possibly some kind of way to control it, I would be most grateful. Do I need to not use Tahoma and use Calibri or even Terminal type fonts?