A window assembly includes an electro-optic assembly that includes a first substrate that defines first and second surfaces, a second substrate that defines third and fourth surfaces, and a seal disposed about a periphery of the first and second substrates. The seal, the first substrate, and the second substrate define a chamber therebetween. A transparent electrode coating is disposed on each of the second surface and the third surface and an electro-optic medium is disposed between the first substrate and the second substrate. A controller is operably coupled with the transparent electrode coating on the second surface and the transparent electrode coating on the third surface and is configured to change a transmittance state of the electro-optic medium. An interface is operably coupled with the controller and allows adjustment of the transmittance state of the electro-optic medium. The interface includes a display that illustrates a selected transmittance state.