WordPress.org

What does "Switch off" mean?

Switching off logs you out of your account but retains your current user ID in a cookie so you can switch straight back (ie. log straight back in) without having to log in with your username and password. It's akin to switching to no user, and being able to switch back.

The Switch Off link can be found in your profile menu in the WordPress toolbar. Once you've switched off you'll see a Switch back link in the footer of your site.

Does this plugin work with WordPress Multisite?

Yes, and you'll also be able to switch users from the Users screen in Network Admin.

Does this plugin work with BuddyPress?

Yes, and you'll also be able to switch users from the Members screens.

Does this plugin work with WordPress MU?

Yes, but you should really update to Multisite.

Does this work as a mu-plugin?

Yes, but you'll need to install user-switching.php into the root of your mu-plugins directory, not in the user-switching subdirectory. This is a restriction of WordPress.

What capability does a user need in order to switch accounts?

A user needs the edit_users capability in order to switch user accounts. By default only Administrators have this capability, and with Multisite enabled only Super Admins have this capability.