'DRSProfileName' and 'DRSName' tags

[klime]

When I do the following command on a PNG:

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exiftool -a -s AnselTest.png

I get the following output:
https://i.imgur.com/YDNjUxq.png

However, if I try to modify the values for tags 'DRSProfileName' or 'DRSName', exiftool returns:

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Warning: Tag 'DRSProfileName' is not defined

I also cannot assign this tag any value in a seperate PNG, for the same reason.

Some more context: This is a PNG generated by nVidia's Ansel Software, and is an in-game screenshot from the game 'Space Engineers'.

Is there anyway to enable editing of this tag? If this is not possible, can I create my own tag of the same name, and input strings as the values?

[Phil Harvey]

Add the -G1 option to your command to show the location of this tag.  What is the location?

- Phil

[klime]

Adding the -G1 tag shows this result

https://i.imgur.com/z3PErA9.png

It appears to be part of the PNG group

[Phil Harvey]

OK, thanks.

You will need to create a user-defined PNG tag to be able to write this.  See the user-defined PNG tags (NewPngTag1, etc) in the example config file for an example of how to do this.

- Phil