Big font for the songname no, you can't.
When you first wrote "huge 1A" I thought of something extremely simple that may help.
If I didn't understand you wrong, YES, I do have the patches with the entire name of the songs with the same font of the "1A, 1B..." but not that big but completaly easy to read during a gig (if you don't wear glasses lol).
You know that the display has 3 modes of view, right? Look at your display with the POD on and press one time the button "View". It will switch the display mode.
So there are 3 view modes:
1) The HUGE "1A, 1B"...,
2) with the name of the patch and the chain you're using;
3) with the 4 blocks (dyn, dist, mod, reverb).
To change the view modes just press the button VIEW on the left of the display
I hope this may help a little...