You can add custom images to a proposal just like you would when building articles (or product and package descriptions) in the content library. Full size images will upload at a width of 600 pixels. Images larger than this size will resize to 600 pixels automatically. If you would like the picture to be smaller, you must resize it prior to uploading into VIPER. For example, if you want to take up only half the page and use the other half for text, resize the image width to 300 pixels.