cyztalzboyz I would like to disable navigate bar to prevent client move to other gallery and redirect to root by URL.
You mean the sidebar? See config option menu_enabled.
Keep in mind, if you want to block the user from navigating to parent dirs, you would then also need to disable breadcrumbs in the topbar. There are no config options for this, but it can be hidden with custom CSS:
#breadcrumbs {
display: none !important;
}
Of course, users could still type into the URL to navigate to the root . Unless perhaps you add a .htaccess redirect when someone tries to access the root url.