Option or keyboard shortcut to apply all operations of a parent task on its sub tasks

Would be nice to easily apply all operations on a parent task to its sub-tasks. For example, if I want to change the priority of all of a task's sub tasks, I currently need to expand and then select all the sub tasks and apply a batch operation. Ideally, I'd be able to hold down a keyboard shortcut and change the priority only on the select parent task and the operation would apply to all the children tasks.