ServiceNow Blog

 ServiceNow CMDB Key Value Table You can use the cmdb_key_value table to store attributes in the CMDB against a CI via a linked key value table - one row per attribute this has a many-to-one relationship to the CI and can be displayed on the CI in a related list

Modify the preview fields on reference field - pull in class field ("i" icon)   configuration item field> go to the classes by their table https:/<>.service-now.com/cmdb_ci_win_server.do? sysparm_view=sys_popup edit the form to pull in the desired fields, e.g. class (class maybe not the best example as this displays at the top of the popup but illustrates the point!) sys user>  https:/<>.service-now.com/sys_user.do? sysparm_view=sys_popup

 cmdb_ci field: change auto complete to include serial_number, asset_tag /sys_schema_attribute_m2m_list.do?sysparm_query=schema%3D2207a8941b30101059de620e6e4bcb90&sysparm_view=advanced&sysparm_first_row=1