The first tab allows you to enter formulas according to the selected curve properties. Entered can be done manually or using the canned keys of the calculator proposed.
Once the indicated formulas, you can add them to your favourites and to save them in order to be able, thereafter, to select them.
If favourites is not useful any more, it can be removed list. These files are with the format “Xml”.
A list of favourites is installed by default gathering a certain number of type of equations. An explanation is available in the tab "Options''.
The difference between the calculated points is function of the variable “T” for which one defines the value of beginning, the value of end and the step.