Yeah, Ian, you can resize it to proportions for printing. However a few things to consider

* Make sure you are resizing to the same aspect ratio as the original. So if your original is 3:2, you can go to 6:4 12:8 etc, otherwise you will end up cropping bits or distorting the result. Try it, open a photo, unclick 'constrain proportions' and type in any random value to the fields and press OK. See why keeping the aspect ratio is important. Use Undo to get rid of the distorted photo you now have.

* For printing you need a higher resolution than the 72 (which is an old screen resolution, most are now about 100), up that to around 300. You need at least 200 for high quality printing.