I have created my own layout in mendix app. Steps I performed : Created a blank layout. Opened Atlas_Default layout from App Store Mmodules → Atlas_UI_Resources → Layouts → Responsive → Atlas_Default Copied whole content from this layout to my layout. Set this layout to my home page. Now on deploying the app, UI is totally messed up. Am I missing applying CSS or what? This is how my home page looks: Are there any guidelines/document for creating layout?