The user menu can be found in the upper right corner of the WebClient. A right click on the logged in user opens it.
Options in the user menu
All possible settings can be viewed in the following chapter settings.
Switch to LightClient
What the LightClient is able to do in the web view can be inspected here.
A click on help takes you directly to the Password Safe documentation page.
This locks the user who is currently logged in and only needs to enter his password to use the web client again.
The logged in user is logged out. All relevant information is now required to log on again.