Autodesk's Sketchbook Pro 6 combines powerful graphic design tools with an intuitive interface that makes users feel like they're drawing on paper. Users select from a variety of customizable brush types and then simply drag the brush across the screen with a mouse or touch screen to add designs and color. For blending different elements, users can separate colors and shapes on different layers and then select one of Sketchbook's blending modes right from the Layer Editor window.
Make sure the Layer Editor window is open on your Sketchbook screen. It should open by default on a new drawing. If you closed it, click on "Window" in the top menu and select "Layer Editor."
Create your first layer. Use brushes to create a design or simply select the paint bucket for a single-color background.
Click on the "+" icon on the top of the Layer Editor window to create a new layer.
Create the second layer you want to blend with the first. Before blending, colors in your second layer will appear over the first layer without reflecting the background color scheme.
Select a blend mode. Make sure your second layer is selected in the Layer Editor window and click on the arrow icons at the top of the Layer Editor window on either side of the word "Normal." Normal is the default setting with no blending; Screen, Multiply and Add are Sketchbook's three blending modes. Sketchbook will apply the desired blending mode to alter colors in your second layer based on the values in the first.
The Screen blending mode brightens colors in the selected layer based on values in another layer. This mode eliminates blacks in the layer and leaves whites, which cannot be brightened any further. Intermediate colors are brightened using warm bright values from another layer.
The Multiply blending mode does the opposite, darkening colors based on values in another layer. The Multiply mode eliminates whites and ignores black areas that cannot be darkened any further.
The Add mode saturates pixels to create warmer colors. This mode eliminates black colors and leaves white areas as they are.
For blending borders between colors on a single layer, choose the Blur or Smear brush from the brush menu and drag the brush along the areas you want to blend.