Did you know that ServiceNow offers many Dictionary Attributes to modify the behaviour of a table or a field?

To administer Dictionary Attributes for a Table or a field simply navigate to:

System Definition > Dictionary > Dictionary Entry and add the required attribute to the Attributed field (under the Advanced View) or by using the Attributes related list.

Alternatively directly form a record you can use the context menu to configure the dictionary for the table or directly on a field to configure the attributes for a single field.

Note: Attributes are comma-separated; if attributes exist on a dictionary record, add a comma, with no spaces, before adding an attribute (when not using the related list).

Note: If you remove an attribute that is part of the base system, it is automatically restored during an upgrade. To prevent upgrades from changing the desired behavior of your system, leave the attribute on the table or field, but set its value as desired.

Some useful Dictionary Attributes that you may or may not know about:

calendar_elementsSpecifies a list of fields used when constructing the description of a calendar event*email_clientCauses an icon (an envelope) to appear on the right side of the form’s navigation bar, just to the left of the up and down arrows. If clicked, a popup email client appears.knowledge_searchCauses a knowledge search icon (a small book) to appear next to the field.no_attachmentPrevents the attachment icon (a paperclip) from appearing on the form’s navigation barno_emailIf true, the email box is removed from the glide_list field like the “Watch list” field.tree_pickerDisplays the hierarchy of reference values in a tree display (such as locations).use_document_viewer*Attribute to enable or disable document viewer to preview attachments

A full list of Dictionary Attributes may be found in the Dictionary Attributes [sys_schema_attribute] table.