What type of input is used for the Document Numbering Prefix field?

The Document Numbering Prefix field requires a specific type of input that allows users to enter textual information directly. This is why a Text Box is the correct choice.

A Text Box is designed for users to input alphanumeric characters freely, making it suitable for creating a prefix that could involve letters, numbers, or a combination of both. This flexibility is essential when defining prefixes for document numbering systems, which often require specific formatting or characters based on organizational standards.

In contrast, other input types such as Radio Buttons, Checkboxes, and Dropdown Menus are not suitable for this purpose. Radio Buttons enable selection of a single option from a predefined set, Checkboxes allow for multiple selections among options, and Dropdown Menus provide a list of predefined choices for selection. None of these options would allow for the level of customization and specificity needed for entering a document number prefix.