@田恩睿 It's probably better to keep the menu where it is, or at least in that file, but play around with the structure and CSS to have a left-side menu.
Right now it is pinned to the top using .navbar-fixed-top
How to turn off user choose skin in Persona Theme?
You can hide the option via custom CSS. I'd like to remove it eventually for good, although lots of people still use skins
@paopevil Go to ACP -> Settings -> User and enable the option "Prevent users from choosing a custom skin".
@pichalite Thank you! This working!