The menu provided in Lucid uses Menu Smart and the Responsive Muse Menu.
A how-to for customizing the side navigation is down below.
The menu trigger and logo is hidden and shown with QooQee's Menu Smart widget. Menu Smart hides the menu when users scroll down, and it also brings the menu back into view when users scroll up.
Check out the links below for more information to help you customize your menu with Menu Smart.
Responsive Muse Menu
The Responsive Muse Menu is a multipurpose navigation widget. It allows you to create a great variety of menus that consistently work through all different devices. The widget is fully responsive and can be fully customized for each breakpoint separately.
Click here to learn how to clear the Responsive Muse Menu so you can easily add your own content.
Check out the links below for more information to help you customize your menu with the Responsive Muse Menu.