Symbol   Signification
    Works with EasyScan in this O.S.
    Tested by a user, but without giving result on how it works
    Does not works with EasyScan in this O.S.
(!) / (!!) / (!!!)   See comments
(1)   Use the "Ignore scanner absence" option in the "Preferences" menu
(2)   The resolutions must be set manually
(3)   Adjust colors in the source configuration