Online printers

[mrodgers]

Here's a quickie question. I am sending photos online to print for the first time. I have some in landscape orientation and some in portrait orientation.

Do I have to rotate them any certain way to have them printed? I am uploading to Adorama, BTW. I wasn't sure if I had to have them all uploaded in landscape orientation or not.

As for the photo sizes, I have a bunch of 4x6 shots and a couple to have printed at 8x10 (doubt that matters though...)

Thanks

PS. Adorama is horribly slow with uploading, wow...