You can add a default, Thick Paint, Watercolor, or Liquid Ink layer to an image at any time. When you paint with compatible or incompatible brushes on Thick Paint, Watercolor, and Liquid Ink layers, the application will warn you and let you set a default behavior.
You can let Corel Painter automatically create a new compatible or default layer for you and save this option in the application preferences. You can also modify how Corel Painter behaves when you paint on special layers in preferences. For more information, see Special layers preferences.
When you create a layer, the new layer is placed directly above the selected layer in the Layers panel. If the selected layer belongs to a group, the new layer is added to the group. If a layer group is selected, the layer is placed above the group. You can also change the order in which layers are displayed. For more information, see Changing layer order and Grouping layers.
You can also delete shape layers by selecting the shape and pressing Delete (macOS) or Backspace (Windows).