This simple diagram was designed to show all module positions, which are available in template.

By default, all modules published in these positions are displayed in columns and grouped in rows, up to 4 modules per row. All modules in row will have an equal widths. Additionally, you can switched desired flexible module position to "custom widths", to use custom alternative layout for modules. You can set manually width of every single module. With custom widths option selected you can publish up to 12 modules in a single position, all modules are displayed in a single row.