@sil you can click the different templates until you breach the 75 chars limit and then remove a couple to get it to the 75 char limit. 75 chars is annoyingly low so that you can't include numbers and useful internet punctuation...
@foobarry I mean, fair play to them, it's a pretty neat service and you get quite a bit for free so can't really complain. I didn't know I could do more than the basic letters template though!