The single functions
In the main window all available functions are clustered in several areas. Just expand to see what's behind. The functions can be used simultaneously. Thus, once you have chosen a function you can go back to this screen and use other functions (or the same using other parameters) in parallel.
For most of the functions you can save and load your done input in "variants" (similar to the concept with the same name in SAP systems). In case the "variant" functionality is available in the chosen function you will see 2 buttons at the top of the dialog window.
You can use the "variant" functionality to store and reuse your input in the functions as well as for the Command line tool, which enables you to use the function in one-line expressions, e.g. in automation software.
Note that the selected connection is also part of a variant. Typically the SAP connection in the single functions will be initialized with the one chosen in the main window. Using a variant also changes the chosen SAP connection.