A single fragmentation process with a selected fragmentation algorithm can be started with the button in the bottom left corner. It is labelled with the selected fragmentation algorithm, which can be changed in a respective menu. The Ertl algorithm for functional group detection is selected for the fragmentation process in Figure . In its MORTAR implementation, it returns identified functional groups and resulting alkane remnants as fragments by default. The settings of the individual fragmentation algorithms and the MORTAR application in general can be adjusted via separate dialogs (see Figure and Figure ). The view for the settings of the algorithms is automatically extended for a new algorithm when it is integrated.