"from" name in Xfinity email

I want my "from" name in Xfinity email not to show in all capital letters.

In "My Account" for Xfinity, my name shows in all caps.  If I "edit" to capitalizing only the first letters and then "save," I get a message saying someone already has taken that name.

I also have no way to make the change in an open "Compose" box.

ARGH!