Dear PauloRicardodaSilvaMendona,
If you mean lock/unlock icons of the Quick access toolbar, these are pre-configured commands that are not available for all devices.
There are no pre-configured commands for the ST310u, but you can use the Command Panel to remotely send commands to the device. We recommend checking the syntax of the commands with the tracker manufacturer, as they may differ significantly depending on the device model.
If you mean something else, please email us to support@gps-trace.com , specify your login and describe your problem in more detail. We will try to help you!