A red frame is always visible in the preview. This frame marks the area that is being scanned and the frame on which you are currently working. The red frame is therefore equivalent to the image being scanned.
You can move a frame with the mouse, or you can shrink or enlarge it by clicking on and dragging one of the four sides of the frame. If you click on and drag the frame's corners with the mouse, you can change two sides at the same time. You can rotate the frame by clicking on and rotating the semicircles at the halfway points of the sides.
You can change the frame in the preview and in the zoomed preview, whereas in the 1:1 and HQ preview it is fixed and cannot be adapted. The fine rotation is not available if you have selected one of the HDR or HDRi formats. Go ahead and adapt the red frame to your image.
For negatives in particular, it is important to set up the frame precisely because all information is the red frame is taken into account for the conversion. In the case of a negative, a black edge around the actual image would make the converted image brighter than it actually is.
With a film scanner, you only have one image per preview in most cases. The holder is moved to the corresponding position for the next image.
The situation is different with a flatbed scanner, on which the film holders can in most cases accommodate several slides or film strips. In this case, you can use the frame search IFF+ for corresponding holder in the software. The frame search creates a frame for you for each image recognized. In particular, the frame search IFF+ saves a lot of time when a flatbed scanner is used. Here too, the red frame is always the active frame for which you set changes. In a batch scan of course, all frames are scanned including the non-active ones.
For the frame search, click on "Frame" and then on "Find Frame". Now select the matching holder that you have inserted. If you are using the 35mm holder, select "Slide holder 35mm". The frame search now creates all the necessary frames for you itself.
As explained in the section about the preview, in Ai Studio you can activate the high-resolution preview before you perform a preview scan. This provides more exact data for the most precise detection of frames possible.
When you configure the active frame and only then start the frame search, the frames are created with the configuration of the first frame. This means that the same settings do not have to be made for each frame over and over again. There are some tools that work automatically and that are optimally suited to be copied. See the chapter "Scan and Batch Scan" for more details.
If you have first used the frame search, you can also accept the active frame's settings for all frames in the frame menu. Both of these require you to be in the unzoomed view for the entire flatbed.
On most scanners, you can create new frames manually in addition to the frame search. Draw frame: To do this, click with the mouse in an area of the preview without a frame, and draw a new frame while keeping the mouse button pressed. Release the mouse button to create the new frame. Copy frame: However, you can also move an already existing frame while keeping the ALT key on your keyboard pressed. When you release the frame, a copy of the frame is created at the new position. The new frame takes over the setting that were made for the original frame.