In which property can you modify a form to prevent new records from being added?

To prevent new records from being added in a form, the relevant property to modify is the "Allow Additions" property. By setting this property to "No," you effectively restrict users from inputting new records through that form. This is particularly useful in scenarios where you want to maintain the integrity of existing data or where the form is intended solely for data viewing or editing existing records.

The other properties related to editing records serve different purposes. "Allow Edits" enables users to change information within existing records, while "Allow Deletions" allows the removal of records from the data source. "Allow Updates" typically refers to the permission levels around data modifications, which might still allow adding records if the "Allow Additions" property isn't adjusted. Thus, modifying the "Allow Additions" property directly addresses the need to prevent the creation of new records.