The "Source Settings" area is used for a couple of different things.
In here, we can add or remove custom sources, as well as change the text display colour of any of our sources.

The different fields of the Source Settings relate to different settings, some are user editable, some are not.
Custom sources are set to False by default.
Right clicking (Control-Click on Mac) on a source name with No Change set as "True" will result in the sub-menu containing

Right clicking (Control-Click on Mac) on a source name with No Change set as "False" will result in the sub-menu containing

Warning:
"Restore Defaults" will delete any manually added sources and cause any relatives for that source to become detached. You will need to re-add that source with identical Code and Name to re-attach any relatives impacted.

Note: Do not use the same Code or Name as an existing source.
Changing the text colour assigned to a source, is done by clicking on the coloured block associated with the source.
This opens the Colour Picker, enabling you to select any colour other than Black to assign to the chosen source.
Black is a reserved colour and is assigned to merged relatives who have more than one source.

The "Archived" and "COA" match key fields are left over from Genome Mate Pro as a courtesy to those who have converted their database from GMP to GDAT and have data imported from sources that are not supported by GDAT. If you do not have any data in these sources, you may delete them if you wish.
GDAT (Genealogical DNA Analysis Tool) is a DNAGedcom tool. © DNAGedcom LLC 2020–2026. Genealogical DNA Analysis Tool is provided as is with no guarantee given as to its performance.