Double-click the ETC cell for the task whose ETC value you want to edit.
Important: Any changes you make to a task in the Task List are equivalent to editing the task in the Task Details window.
Note: You cannot use in-line edit to change ETC if your enterprise uses % Complete to track task progress. (This enterprise-wide setting is configured by your administrator.) To change ETC in an enterprise using % Complete, click Edit Task in the Actions menu.
(click outside window to close)