If you want to Blrt over images added from Dropbox:
- Start a new Blrt.
- When the 'Add pages to Blrt' screen appears tap the add page button (a page with a '+' in the middle).
- When the 'Add media' screen appears select to add an image.
- Tap the 'Dropbox' icon on the 'Image' screen, that will take you into the Dropbox application where you can select the photo/image you wish to add.
- Once selected Blrt will download the media and add it as a page in your Blrt.