The way in which you can work with the preview differs slightly depending on whether you use a flatbed scanner or a film scanner without automatic feed or a film scanner with automatic feed.
In the case of a flatbed scanner, you call up the preview via the Preview Scan button in the bar above the preview. For the preview, the entire flatbed is scanned in low resolution and is shown in the preview window.
In Ai Studio, a high-resolution preview can be activated for flatbed scanners under OSX via the menu SilverFast 9 > Settings > General and under Windows via the menu Image > Settings > General. This is then performed with a multiple of the selected preview resolution. This takes a slightly longer initially, but subsequently saves a great deal of time. Without getting too far ahead of ourselves, it is important to point out that both the automatic image optimization and the frame search IFF+ (Intelligent Frame Finding) work all the more precisely the more data is available. If you want to use the high-resolution preview, you must define the scan resolution before the preview scan. See the chapter "Scan Dimensions" for more about resolution.
In the case of a flatbed scanner without automatic feed also, you call up the preview via the Preview Scan button in the bar above the preview. The current image is then scanner for the preview. The current image is then scanned for the preview.
For film scanners with automatic feed there is an additional function called the overview. The button for the overview scan is in the vertical tool bar, on the left next to the preview images.
The overview scan creates an overview of the images in the inserted holder in an additional window. In this overview you can mark the images that you want to select for the final scan.
In addition to the markings, there is also a frame which you can use to select the image for the preview. The overview dialog is therefore also the tool for switching between the previews of the inserted images.
In SilverFast Ai Studio, there is also the possibility of transferring a selection of images directly into the JobManager ("Add Selection" button), where you can then edit each image with individual optimizations before starting the batch processing.
Nikon 35mm scanner with SF-200 and SF-210 holder: No overview dialog is available for this holder because the holder can transport the images in one direction only.
In the case of the Reflecta DigitDia 6000 and 7000 and PIE PowerSlide X, the overview dialog also offers configurations to set up the slide tray. With this device, the overview scan is not automatically started because this would take considerable time - depending on the slide tray used. The automatic overview scan can be activated and deactivated again via Settings > Special if you want to make use of it.