The "printability" really depends on how many pixels are in the exported photo.
For example, if you want to print 4x6, and most printers need 300 pixels per inch to get good quality results, then your exported photo must be 1200x1800 pixels (or more)
Thanks, how do i find out how many are in the exported photo. I'm sorry I am very new to this.
You normally will set the number of pixels when you Export; this is set in the export dialog box Image Sizing section.
After export, you can also look in your operating system, and it will tell you the number of pixels.
When you are configuring your export options in the export dialogue, you have the option to specify the size in pixels. If you are going to print to a certain dimension, first of all I suggest that you crop the image to that aspect ratio. Then, export an image that will be big enough to support that print size. If the image has enough pixels the PPI setting is meaningless (actually, it's meaningless anyway as far as printing is concerned). For example, assume you want to order or print an image that is 16 and 20 inches at 240 PPI. Here are the steps I would follow.
1. Crop the image using the 4 x 5 - 8 x 10 aspect ratio setting.
2. In the export options specify in the image sizing options, choose long edge 4800 pixels (20"x240 PPI).
3. You can change the PPI setting to 240 if you want, it isn't going to matter.
4. Set any other printing options as required, then export the image.