The Insert Bottom Fill icon shows three stacked horizontal rectangles: a wide top bar, a shorter middle bar, and a large wide bottom block. Drawn in the solid style on a 24px grid, its sharp geometry keeps the filled silhouette clear in compact interfaces. Use it for insert-bottom controls, layout placement, content insertion, and editor toolbars. It belongs to Sharp Fill - Streamline Material set in the Streamline Material family.
Same category - from the Sharp Fill - Streamline Material