# File Layouts Overview

Use the folders on the Contents tab under the File Layouts folder to access the file layout information for each module.

For legacy modules, information in these files includes field descriptions, column names, data types, position, length, and masks for fields. The file layout files also list the record type, file type, and key size.

For modules that have moved to the 4.0 standard of architecture, the file layouts list the defined keys, main business object use for maintenance and Visual Integrator imports, field names and descriptions, and class.