The w3-dropdown-content class creates a panel that is hidden by default and positioned over the surrounding page content.
Place it inside a w3-dropdown-hover container to reveal it when the container is hovered or contains keyboard focus.
The w3-bar-block and w3-bar-item classes arrange the links vertically.
Move the pointer over the button, or press Tab to focus it and then continue through the links.
The panel appears below the button without moving this paragraph down.