Events can be added by clicking anywhere on the persons timeline within Activity or Schedule.
Click on the timeline and select '+ Add', to then enter the event details. To edit an existing event, click on the event and then the pencil icon labeled 'Edit'.
Depending on where you click on the users timeline, the event start time will be from then.
Events can be copied and pasted by clicking on the event, you can then select the option relevant to you. If you are copying and pasting events this can be done by selecting the event and click the the copy option and then right clicking anywhere on the calendar to paste the event. This is a helpful shortcut which both saves time and makes things more efficient.