The default properties (font, width height, etc) for every object type (text box, combo box etc) can be set with the toolbar:
These defaults will apply to every object created on that FORM. To apply the defaults globally set up one form with all the settings you want, call it something like template and copy that form whenever creating a new one.
“My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time” ~ Steve Jobs