How to create a similar menu as on the documentation page
If you want to create menu which is like on this page and always in the sidebar position check these settings.
You should select the Tree navigation type, Left sidebar menu positioning and Auto Open menu on every page load in the Module settings / Basic Parameters.
Navigation type and menu positioning
After that, you should set the Animation Parameters / Sidebar Animations to reduce with.
Animation parameters
There is nothing left behind, check your vertical menu on the frontend.