15. Adjustments for circuit parameters are given in this Circuit Options panel. Each item has a default value, which may be changed easily or reset to the default value. The Frequency List, for example, has mid-band frequencies for each of the ten ham bands (including the proposed 60-meter band), but you may wish to specify a different value for the edge of a band. You may save and recall an unlimited number of frequency lists. In a similar way, typical Required SNR values and bandwidths are shown for each of five Service Types, but you may wish to specify different values. Starting with Version 2, the user may now select the more conservative VOACAP standard Required SNR values. Or, DX/Contest defaults may be used by the more experienced ham operator in contest situations. Man-made Noise Levels are similarly specified in the right-hand panel. This screen also permits the user to decide whether the Sporadic-E (Es) ionospheric layer is to be included in the propagation calculations. Shutting off the Es calculation will result in more conservative predictions. Invoking the Es computation will cause the letters "Es" to appear in the circuit and area coverage comment lines, and in the Main Chart and Area Coverage ID lines.