The pageshell file defines the overall skeleton of your site (e.g., search bar position, column layout).
For a highly customized homepage without intensive coding, developers often use the Widget Manager plugin to build modular layouts. How to create a custom Homepage : Elgg.org Elgg 1.9 Themes
To change styles, you can override elements/layout/columns.css by copying the core file to your plugin's views/default/elements/layout/ directory. The pageshell file defines the overall skeleton of
Adding new content to existing views without replacing them. search bar position
Add a new folder in your installation's /mod/ directory (e.g., /mod/my_custom_theme/ ).
Follow the example of the Aalborg theme by designing for smaller screens first to ensure accessibility.
Use the vars:compiler hook in your plugin's PHP configuration to override global CSS variables like colors and widths.