1) Upload your image file for Midscroll Desktop Image."Please note that the creative for Midscroll Desktop Image should have the following size-dimension: 2560x1440."
Further information: In addition, the key message needs to be placed within the white rectangle illustrated below. This is to ensure that the most important part of the creative will be visible to all users, regardless of the make, model, year or screensize of the desktop/laptop that they're using.
