OK. Thanks. Cheers, Vincent Le 05/07/2020 à 20:36, Ole Streicher a écrit : > Vincent Prat <vinceprat@free.fr> writes: >> I also found (again in tests) a zipped FITS file. Can it still be >> considered as in the preferred form for modification? > I would pragmatically say: yes. Zipping is easily reversible, so you > don't lose anything. > > Cheers > > Ole >