How can I set Enter to insert a manual row break, not a paragraph?

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I need Writer to insert a manual line break when I press Enter.

By default, Enter inserts a paragraph and Shift+Enter inserts a manual row break. I want these switched around so I changed the keyboard configuration and saved it, but the result is that now both actions insert a paragraph. The change is obvious and persisting in the Customize window, but the behavior of Enter doesn't change.

How can I make Enter insert a manual row break? Please help...