You can see the name of current radio source on upper left button and as the title of the graphic. The red approximational curve on the graphic is drawn as it's described in the Fitting help . You can reopen the Graphic Info window by pressing Graphic Info button if you have closed this window or shaded it. Operating of the Main Panel buttons Top buttons You can choose the radio source of the cluster by left button. You can get different possibilities of manipulations with spectral curve using the Fitting menu opened by Fitting button .
Details see in Fitting help .
If you want to print graphic you can see the picture to print in the PrintView window that you can open by the Print button . About print options read in the Print help . Pressing of the Radio emission button opens the window for calculating of radio luminosity and radio power of the source. You can find the details of the calculations in the Luminosity help and in the Power help . Bottom buttons You can set any frequency and flux density diapasons after pressing the Graphic scale button that opens scale menu.