To enter a time estimate for a task:

1. In the tasks list, select the task that you wish to enter a time estimate for.
2. In the task details on the right, click on the estimate field or add the estimate field using Add field.
3. Enter the time estimate in the text box provided and press the Enter key, or select an option from the dropdown.

For a full list of the ways you can enter time estimates, see the formats for time estimates.