Step 1: Choose the right photos
Selecting what photos you want to print is the first part of the printing process. Obviously, you want to print meaningful images but there are also some technical considerations. You want to choose images that are well lit and in-focus. If they look dark and blurry on your screen, they’ll look even darker and blurrier when printed out. However, the most important thing is to choose high-resolution original files to print. The good news is that this is really easy to get right so long as you avoid one common pitfall.
Every modern camera takes incredible high resolution images. A 24 megapixel camera, a common smartphone choice, takes an image that’s approximately 4000 x 6000 pixels. At 300 dots-per-inch (the basic benchmark for a high quality print that you want to view close up), you can print a canvas that’s approximately 13-inches by 20-inches before you have to even consider upscaling or lowering the print resolution.
Now, here’s the catch: those 24MP files are pretty big, so when you share an image over WhatsApp, Facebook, Instagram, or other social network, it typically gets compressed. This is a good thing if you want your images to upload quickly but it’s terrible for print quality. Depending on the original image and upload settings, a 24MP file can get reduced to a 12MP file or even a 2MP file.
If you shot the images yourself, then you have the originals. Just make sure to select them when you go to print. If you want to print images that someone else has sent you, then for best results you should ask them to send you the originals using a file transfer service like Dropbox or Google Drive.