"Eric Stevens" wrote

| You just have to match it up to the printer. For
| instance, a typical photo should be printed at
| least 300 dpi.
|
| Not on the 'photo' Epsons. They use 360 dpi. It pays to check the dpi
| of the printer you plan to use.
|

It's just an example. The R2880 here defaults to
1440, but it doesn't have to be used that way.
You should have read the rest of what I wrote....

| That means to get a 5x7 print you
| need 1500x2100 pixels. It doesn't matter what size
| the image is and what dpi the printer is set for.
| You just need to coordinate the two so that it
| will print the size you intend. 300 dpi will give you
| nicer edges on letters, but I guess that probably
| doesn't matter much.