So if I have a picture in jpeg format, then I should convert it, using
photoshop, to TIFF format? Or it won't be much different. Huge file won't be
an issue to me.
It's difficult to increase resolution... it's a lot easier to decrease
resolution!
If it's a jpg to start with, I'd probably leave it in jpg mode. Just ensure
you have as little compression as possible when you save it after doing any
editing.
I try to find a way to increase the print quality in the printer. However,
the printer is only 200 dpi so not much I can do via software to help this
out.