Hi Xavier,
No, your only option with image files in DIAdem is to create one image file per REPORT sheet. What would an image file of multiple sheets look like, anyway? If you choose the "HTML" output option, it will automatically create a subfolder of all images, one for each sheet, then present them as stacked vertically in your internet browser. Are you planning to copy the images by hand or programmatically? If you copy them programmatically, it's really not that much more work to loop over a folder of images and copy them in one under the other or one to the right of the other.
Brad Turpin
DIAdem Product Support Engineer
National Instruments
