This tool is another way of modifying a (sub)set of data, in this case the site identifier (SITE_ID_NR) field. This additipnal character goes into position 7 of the site identifier and may be used to identify a group of sites by e.g. specific consultant or project or data capturer or any other characteristic.
The View dropdown box allows setting the identifier, which as default is a “0”, only for the sites in the selected view.
Examples would be 2127ABD0001, where the “D” would be a character for a specific site used for Dewatering, etc.
PLEASE NOTE: This may only work for site identifier which are at least 7 characters long and may cause errors for shorter site identifiers!