Exercise 4 - Colour Theory 2

1. To open up the previous image from exercise 3, the keyboard shortcut for opening an existing document is Command+O.
2. After changing the blending mode of the layer group to 'pass through' and making the background the working layer by selecting it in the layers pallet, fill the background with black. The shortcut key for this is Command+G.
3. Change the red circle layer and the blue and green layers' blending mode to 'lighten' and select the move tool. The shortcut is Command+V.
4. This simulates the ADDITIVE colour system.
5. After you change the blending mode to all of the colour layers to 'difference', this simulates the SUBTRACTIVE colour system.