Flattening and automatic rotation

After perspective correction, curled or wrinkled pages are flattened with an on-device neural network. It is on by default and is skipped automatically for flat pages. Turn it off per page with the "Flatten" chip on the edit screen, or for all pages from the filter menu in the page list ("Flatten curled pages").

The text direction of each page is recognised; a page taken upside down or sideways is saved upright ("Rotated automatically to match the text"). Pages you rotated by hand are left alone.