...
The custom data entry layout file for the new page must follow this naming convention: <definition_page_filename>layout.xml. More than one layout files can exist per data entry definition page. In such cases a default data entry layout file per database must be defined in templates properties file (templates.properties)
Customise Existing Data Entry Pages
...
Templates Properties File
The templates properties file (templates.properties file ) is used for defining the default data entry layout files, for data entry definition pages that file per database and/or unit, when more than one layout files exist , per database and unit. Such pages are:per data entry definition page.
For a full list of data entry page attributes, go to Data Entry Pages Documentation