In order to archive a Run or Result schema field, first go to your Result/Run JSON spec box. This can be found by navigating to your Avatar in the bottom left corner of Benchling > Feature Settings > Result schemas or Run schemas. Here select the specific Result/Run schema you want to archive a field on.
Then, scroll down to the field that you wish to archive. Add a new property called "archiveRecord" with the reason for archival, as shown below:
Note: you can leave "archiveRecord" : {} brackets empty to default to the reason of "Other".