You can create your task by following the given steps:
STEP-1: Click on Prospects → Lead → List Of Leads.
Select any one Lead and Right Click on it.
Select Add Task.
STEP-2: Fill Task Details.
STEP-3: Assign Task to User or team by selecting single or multiple entries from the list.
STEP-4: Click on Save button.
Note: You can Add Task from Opportunity, and Campaign using same above method.
Click on Activity → Tasks→ List All. The list of All Tasks will display.
Note: You can see List of Task assigned to you, assigned to your team and reviewed by you by selecting respective option.
You can edit Tasks by following the given steps:
STEP-1: Select the Task that you want to edit. Right click on it and select Edit Task.
STEP-2: Edit the details and click on Save button.