Beastlord mini-hotbar
The Beastlord hotbar has two modes: maximized and minimized. The maximized bar has an ornate border and paw graphics, while the minimized bar has a simple frame similar to the other hotbars. DarqUI settings only affect the minimized hotbar. You can switch between the two modes in game by right-clicking the hotbar and choosing from the context menu.
The frame around the Beastlord mini-hotbar is quite small which can make moving and resizing difficult. The DarqUI version has hidden guides along the edges of the mini-hotbar to make this easier. Use the top and left edges to move the bar, and use the right and bottom edges to stretch the frame.