When you click Add A New Item, you will be asked to provide the title followed by adding photos.
After you have either taken or uploaded a photo you can click the icon in the bottom left to FIT or FILL the image. This can be changed later at any time.
Under the photo is Photo Type, clicking this will display the different types your photo is (Hanger, Me, Label, Retailer/Web) if you can choose the closest to what the picture shows.
You can manage and replace pictures using the icons around the thumbnails after you have taken a photo. The options are -
Make Thumbnail Image - Clicking the picture icon in the bottom left will change the thumbnail image that is shown when users look on Browse Dopplle.
Edit Image - Clicking the pencil icon on the bottom right will allow you to change the Fit/Fill option and Photo Type.
Delete Image - Clicking the bin icon on the top right will delete the image, you will be asked to confirm before deleting it. If that photo was the thumbnail of the listing, it will move to the next image.