When copying and pasting selections of tasks, any parent-child hierarchy within the selection is maintained, as far as possible.
If a parent task and child task are copied and pasted, the parent-child relationship is maintained between the two tasks. Note: Their hierarchy within the target Task List depends on where they are pasted.
If a child task is copied and pasted but its immediate parent is not, the child task is given an indent level equal to the root of the selected tasks. For example, if a task and a grandchild task are selected but the intermediate task is not, when the two tasks are pasted in the target Task List, both tasks will have the same indent level.
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