Vertical Layouts
You can change or customize the left side navigation very easily.
How to add new menu items/change menu items?
In order to add, change or remove menu items from the left side navigation, simply edit in file
templates/partials/sidebar.html.twig. The change would reflect in all the twig files automatically.
which would actually take care of including the sidebar.html.twig file content in all the pages.
How to use pre-built layouts?
Each of the layout options is provided below with steps you would need to perform: templates/partials/body.html.twig
Light Sidebar
Remove data attributedata-sidebar="light" body element to have light sidebar.
Compact Sidebar
Keep your body element with data attributedata-sidebar-size="small" E.g. <body data-sidebar-size="small"> to have small sidebar.
Icon Sidebar
Keep your body element with classvertical-collpsed" E.g. <body class="vertical-collpsed"> to have icon sidebar.
Boxed Layout
Keep your body element with classvertical-collpsed and data attribute data-layout-size="boxed" data-keep-enlarged="true" E.g. <body class="vertical-collpsed" data-layout-size="boxed" data-keep-enlarged="true"> to have boxed layout with icon view sidebar.