The editor will display an exclamation mark warning sign if the uploaded file is too small to be printed at the selected size. The message appears if the uploaded file has less than half of the recommended number of pixels for the selected print size.
If you are receiving this warning, we recommend selecting a smaller print size, or sourcing a higher resolution file. While you may proceed with the file as is, disregarding the warning, please keep in mind this would likely result in a pixelated print.