JMMJ JMMJ.LayoutEditor by: JMMJ .NET Framework 4.5.2 This package targets .NET Framework 4.5.2. The package is compatible with this framework or higher. 5,984 total downloads last updated 1/11/2018 Latest version: 1.0.3 Umbraco Layout Editor The Layout Editor is used to construct modular site content in a flexible WYSIWYG editor based on Umbraco Macros functionality.