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Welcome to the forums, beluga.
In other words, hold down the SHIFT key and click each item you want to include in the delete.
Sometimes, you can select the first item, scroll down the list somewhere, and then hold down the SHIFT key while clicking another item. The items in between the 2 clicked items should now be included (highlighted) for the delete. Otherwise, you get to click them one at a time.
Please come back often, learn more, and maybe help others.
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