If you need to amend any task details, mark it as complete or delete it from CampaignAmp entirely:
In the Tasks Tab:
Find the task in the task list on the left and click on the green 'Tick' icon
Select a task on the left-hand side to open it on the right
Click the "Tick" icon to mark a task as complete. Go you!
Select the "Edit" icon to amend any of the task details
Click the "X" icon to "Delete" the task completely
In any Diary or the Scheduler Tab:
Open the actions panel of any Task Event
Click on the 'Tick' icon to mark the Task as having been completed.
Click the 'Edit' icon to amend the Task details
Click on the 'X' icon to 'Delete' the Task