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 Admin/templates/partials/sidebar.html. The change would reflect in all the html files automatically.

How to change width?

In order to change the width of left side navigation bar, open a file src/css/tailwind.css and change the value of variable(root) $sidebar-width. The default value is set to 250px.