In the Task view, the project summary task and other tasks can be selected for editing or changing the view. Resources cannot be selected in this view.

▪To select or deselect a task, use the checkboxes in the first column.
If you select a summary task and move or delete it, the sub-tasks will be moved or deleted as well.

▪To select or deselect all tasks at once, use the checkbox in the column header.