You can resize the image under Image Sizing in the Export dialog.
Check Resize to fit, and enter the desired dimensions.
so it i wanted say a 16 X 20 put that in the dimesions and put the resolution to 300 would that work? Also i am trying to send them to a disc to burn the photos but when i do it they are so small you can see them? What am i doing wrong?
so it i wanted say a 16 X 20 put that in the dimesions and put the resolution to 300 would that work?
That depends on the pixel dimensions of the original. To avoid enlarging the image, which would affect quality, you would need an image that has at least 4800 (16x300) by 6000 (20x300) pixels. That is what you'd get from a 29 Megapixel camera, but you could probably get away with a 24 MP, or even 20 MP camera. Depends on your requirements, and you may, or may not find the quality acceptable. However, for such a large print you may not need 300 ppi, 200 may be sufficient, which requires fewer pixels. (do the math) It also depends on how the image is going to printed.
16 x 20 is a 4:5 to ratio, so you would need to crop the image to that ratio before you export it, unless the original already has that ratio.
Or just choose Long Side and enter 20 inches in the export dialog, and the short side will automatically be calculated.
(if this is a DSLR camera, the short side will be 13.3 inches)
Also i am trying to send them to a disc to burn the photos but when i do it they are so small you can see them? What am i doing wrong?
What are the pixel dimensions of the images?
If they are intended for screen viewing, they should be at least 800 - 1000 pixels on the long side.