Install libraw-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libraw-doc
Description:
raw image decoder library (documentation)
LibRaw is a library for reading RAW files obtained from digital photo cameras (CRW/CR2, NEF, RAF, DNG, and others). . This package contains documentation files.
Homepage: http://www.libraw.org/
Version: 0.18.8-1
Section: doc