Change/modify

From Wikipedia

By clicking the text of an event no matter if in day-, month- or year- view or the event list, you can change the content of the event and the event itself. After that the form view will be displayed, but without group events and serial events.

Attention: For group- and serial- events every entry needs to be modified separate. As alternative you can delete group- and serial- events first (refer the following topic) and set them new.