Select which star to observe tonight, the main windows show for each star in the current input file the time of next minima and maxima and the estimated actual magnitude; click on a line to show the estimated light curve and your observation point.

You may plot your own observation in VSNET format or data from AAVSO or AFOEV; you may click on a graph to show the magnitude, change the color or the current period and print the graph. If you are connected to the Internet you can immediately get additional data from the AAVSO Quick Look or the VSNET data browser

A mouse right click on a line of the main window show you a menu to enter a new observation. UT decimal is automatically calculated from date and UT time; you can also use the AAVSO PCObs software to enter your observation, in this case you can copy the star designation by using Shift+Insert in the corresponding field.

You are also allowed to plot a chart of the selected star using "Cartes du Ciel / Sky Charts". The chart is automatically centered on the current star and use a customizable profile for the default options.