I created a couple of electrical symbols a generic annotations. Although this doesn't use the hole functionality of BIM, I am happy with it. The symbols are always the same size on the sheet, whatever the scale of the view is.
However, I haven't found yet how to change the line type. Revit MEP2011 offers me only the generic annotation line or invisible lines. The generic annotation lines is a little bit too thin and I would like to use a slightly thicker one.
If I go to the additional settings on the ribbon, the line style link on the dropdown menu is greyed out.
I have attached a sample.