Welcome to MR, new.
I also have the 505 (It's
*BLUE*) and, I'm still learning about all it can do.
I prefer to download in lrf (Sony BBeB) which is non DRM'd then, I use ePub. I usually avoid pdf unless I have no choice.
Have fun exploring the threads and jump in with questions if you are curious. A friendly member will soon chime in with an answer.
P.S. What do you like to read? What color is your Viewer (oooo, I kind of like that word
) How did you hear about MR? *** see, we have lots of questions also.***