I have cropped and changed a few pics from landscape to portrait but on screen they are not showing as full 4x6 but have a large white border - how can I make them fit the full 4x6 screen or does it matter? If I take them to one of the print shops on Stanley Street will they be able to print full 4x6 or will they print with the white border?
Without knowing how or why you have created a white border it's hard to say what's going on, cropping and rotating between landscape/portrait will not in themselves create a border. Provided they are 4x 6 ratio then most print shops will be able to print or leave off a white border as you request, but why not just crop it off to make things simpler? If they're not 4 x 6 ratio and you want them printed on 4 x 6 paper then the print shop will need to either crop to fill the page or leave a border of some sort.
Thanks MisterD, I didn't intentionally create a border, I set my aspect ratio to 4 x 6 but when I cropped from the landscape pic to put into the portrait pic it created a large white space so I have the pic I want but when you preview it has a large white space and I've tried cropping it but won't let me so I'm not quite sure what I've done. I'll try taking to the shop and hope they can help, if not I'll keep trying!
Not sure what you mean by "put into the portrait pic" but it sounds like you are perhaps pasting a crop of an image into a file that is perhaps at a different resolution. Whilst both the original image and what sounds like a placeholder file might be at an arbitrary '4x6' size, it is actually the number of pixels that determines the 'size' of the image. A '4x6' image at 180ppi will be much smaller than a '4x6' image at 300 ppi, just tagged to print at a lower resolution.
Why do you need to 'put' the 'landscape pic' into the 'portrait pic'? If you don't understand resolution etc you are just making things harder for yourself. Why not just crop to the ratio you need, save under a different file name to preserve the original, and send the cropped file to the printer?