# Tools  ---------------- ## Utils  This icon clears the content of the current layer (but it keeps the layer in the layer stack).  This icon will floodfill a color chosen in Color Wheel or Color Selector, on the entire canvas. It is Alpha sensitive and the flood will depend on Opacity / Flow Value in the Top Bar. ---------------- ## Clear Undo History "Clear Undo History" clears the actions’ cache. It means you won’t be able to undo your actions from that point.