You can add your photos directly from your Dropbox to the PosterMyWall editor.
Just follow these steps.
Create a Dropbox Account/Log in
If you don't have a Dropbox account, click here to get started. It’s a free service and registration is a quick process.
Open your Design
Once you've logged in, open your design in the PosterMyWall editor, click on 'Photo' in the top left corner. Then click 'Add from Dropbox'.
Dropbox will ask you to continue. Click the big blue button to browse your Dropbox collection, and a window will open to your Dropbox.
Select the photos you wish to add, and they will be added to the PosterMyWall editor. Now you're all set!