Firstly, edit your image the way you like it. This includes adding any stroke lines and borders. This should be done as part of the main editing, so that you don't resize it then make it bigger afterwards!
All layers should be flattened.
Next, resize the image so that regardless of whether it is a landscape or portrait orientation, the size should be no more than 1600 pixels wide by 1200 pixels high.
The file should be saved as a .jpg or .jpeg file, and named as <Your Name>, two dashes, then <Image Title>.
i.e. Peter Phillips--My Best Image.jpg
(This format is required to make your PDI image compatible with our competition software being used on our laptop).
Email the final file to: email@example.com.