Disklavier

I posted a message a few weeks ago about the following program. 
http://www.anvilstudio.com/
I use it to format midi files so different parts can be played on my 
disklavier.
I have been using it for a while now and it seems to work well. 
The only thing I can't figure out is how to title the songs so they 
display properly when played on the disklavier.
Some seem to be the same as the file name and others have detailed 
titles. Some display untitled.
Is this a function of the software and are other programs able to input 
a title.
Any help would be appreciated.
Thanks
Alan