BoxNameTitle is a sandbox setting in Sandboxie Ini. It controls whether Sandboxie displays the name of the sandbox in the title bar of a window that belongs to a sandboxed application.
Usage:
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[DefaultBox]
BoxNameTitle=y
By default, Sandboxie only displays the sandboxed [#] indicator in the title bar of a window that belongs to a sandboxed application. For example:
[#] Sandboxie - Front Page - Windows Internet Explorer [#]
Specifying BoxNameTitle=y places the sandbox name in the title bar:
[#] [DefaultBox] Sandboxie - Front Page - Windows Internet Explorer [#]
Related Sandboxie Control setting: Sandbox Settings > Appearance