As stated above. I would export the XML and do a find and replace for the whole document.
What you are looking for is something like this:
(I had to change all the <> to [ ] in my example, since the forum interprets this as html :-))
[parameterid][fontsize[/parameterid]
[name]Size[/name]
[valuemin]0[/valuemin]
[valuemax]1000