Table Number for the related table.
If Type is Comment this is the Field Numnber for the field in Comment Table holding the comments.
If Type is Link this is not filled in.
If Type is Codeunit this is not filled in.
Look at the existing setup for samples.
Further information here.
See also
Reference
Comments SetupThis help includes both Dynamics NAV and Dynamics Business Central (BC). All references to NAV applies to both.