OK...when you add type in PS7 it's vector type so to enlarge it go to, Edit>Transform>Scale and a bounding box will appear around your type. When you've got it to the size you want hit Enter. As long as it stays in this vector format you can resize with zero distortion/artifating, but to work with filters or any of PS7's cool tools you have to Rasterize the type. Do this by going, Layer>Rasterize>Type..
Hope this helps.. ...

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again