hi,

tried to set up the preview pane for a 17x26 page size and couldn't figure out how to do that so I went in the printer driver and set that up. voila, the preview box was 17x26. then I found my panorama and double clicked on it and it opened a window showing the entire panorama. closed that and next I dragged the panorama thumb from the folder onto the page and NO whole panorama, only the thumb preview. How to have the entire panorama (or any image) show on the preview window so I can size/move the image for optimum placement, and not just the thumbnail?

The preview page size is determined from what is set in the driver.
You probably had the crop scissors ON and a print size set that did not match your image 
First set the print size from a pre-set or Custom then click the + on the thumb. Crop scissors ON may crop the print image if aspect ratios of image and print don't match, otherwise leave them off.
The thumbnail is the IMAGE not the print on the page. Once in the queue you can use the Full Page Editor for precise positioning - right hand icon under the page preview.
Terry