just a little note for the dpi's for each field.
8 field: 240 dpi
9 field: 215 dpi
10 field: 195 dpi
11 field: 175 dpi
most of my animation for this movie are in 11 field, so I change the dpi in Photoshop.
just a little information for a new beginner:
dpi = dot per inches
it will be found in 'Edit' ---> image size ---> change to the size of the dpi that you need, it is not going to mention dpi in photoshop, but it is 'pixels/inch'