To create Paste Image effect, click Deformation | Paste Image or select Paste Image folder.
To paste the image from the file, select the location of the file and the image will automatically load
To paste the image from the clipboard, copy it to the clipboard and then press the button Paste Image From Clipboard.
To paste the image from the scanner, press the button Select Twain Source, then Aquire Image.
This executes the Twain Manager, provided by your twain device vendor, and acquires a single image.