To display an enlarged preview window select View Image from the Image menu (or press F7). The image preview window can be left on the screen while more pictures are taken to monitor composition or focus in critical areas e.g. the eyes of a model during a portrait session. The preview window is automatically updated when the image in the main window changes.
The image can be scrolled by moving the scroll bars or by clicking the left button on the mouse and dragging the image. If the image preview window is still displayed when a picture is taken it will be updated to show the same area of the new shot. This is very useful for monitoring important areas of the image e.g. a model's eyes when taking portraits.
When shooting JPEG images the preview is the same size as the final image. To avoid a lengthy delay converting raw images the embedded JPEG is displayed (cameras that shoot CRW raw files) or the associated JPEG when shooting in raw+JPEG mode with the EOS-1D and 1DS. The size of the embedded JPEG for Canon EOS 10D raw files is set using the RAW+JPEG custom function (CFn 8).
NOTE: No image is displayed in the Image preview window when shooting in raw mode with an EOS-1D or 1DS. This is because the raw file only contains a small preview image. Please select Raw+JPEG mode if you wish to display images in this window.