Every message or offer sent will have an image displayed. You’ll upload images to your media library to use later when composing a message.
Once you select an image to upload, the system will crop it to the appropriate size. The keywords will default to the filename, but you should enter some meaningful keywords so that you can find the image later with a search.
When finished, hit the UPLOAD button to insert the image in the media library.
The dashboard is pretty clever about cropping the image but if it’s not doing what you want, you can scale and crop the image to 1000 x 600 in any image editing tool you like before uploading in order to have full control.