Selecting multiple Activities on a calendar can be useful for removing or copying a group of activities.
To select a group of Activities click the fist Activity, then hold down the Command key (Mac) or Control key (PC) and select the additional Activities.
Once you have you have your group selection, you can:
Drag any one of the Activities to move the entire group
Click the copy icon on any of the Activities to copy them all to the clipboard
Click the Delete icon on any of the Activities to delete all of the Activities
To clear the selection simply click any other Activity without holding down shift or cmd/ctrl.
Don't hesitate to get in touch using the support chat below with any questions.