What’s the difference between Auto Reduction and using the Eye Dropper tool to reduce my artwork? Can I use a combination of both?

To automatically reduce your artwork, click, “Auto Reduction,” and enter how many colors you’d like your artwork to be reduced to. You can always add custom colors using the eye dropper tool after your artwork has been automatically reduced.

To select each color yourself, use the eye dropper tool to select each color position that will be added. Previewer will update each of these colors after each selection.