How 4by6.com Works
Step 2. Upload your files
Just drag your front and back layouts onto the proofing tool icon to upload your files. The Proofing Tool is a desktop widget that collects all your fonts, files and images, checks them and upload sthem to 4by6.com.
Tip: If the Proofing Tool finds any problems with your files you'll be given instructions to fix them. Fix the files and drag them back onto the Proofing Tool.