Ok, that makes sense.
I will proceed as follows... I will hold a separate "1.6-gamma-table" that always will be combined with the gamma-tables of XSane (or xscanimage or whatsoever). In this case a "1.0-table" will be interpreted as a "1.6-table" (which is a MUST for NIASH scanners to achieve good biasing). The editable Gamma-Table will then be more a "correction" than a "setup". 1.0 will be a neutral gamma-startup-default which makes perfect sense. Regards Ullrich
