How does Photoshop synthesize three primary colors?

PS Tutorial

How does Photoshop synthesize three primary colors?

1, open the PS page A new mask, the size of the image according to the individual needs of the selection, the production of three primary colors proposed to create a square mask.

2. Select the Elliptical marquee tool on the top left of the mask to make a circle with the following figure on the new mask, and click "Create new fill or adjust layer" in the lower right of the page, select Fill--Red and click OK. The process of making a solid red circle has been completed (this figure is shifted to the current position after the top left finish is made).

3, in accordance with the above method to make a blue solid circle, can be made in the appropriate position, or in the upper left after the completion of the shift to the appropriate position. In order to make the three circles exactly the same, so all in the upper left position, all using the Shift method to complete, and the underlined position (the underlined bar after the layer synthesized is automatically cleared).

4, after the completion of the above coincident circle, click the "Mixed Options", select "Linear Dodge" after the Click "OK", that is, the completion of the red, Blue Two-color synthesis diagram (see below);

5, in accordance with the above steps to complete the green circle production, displacement, the final synthesis of the following "Three primary colors" effect map.

The three primary colors composite diagram is done! (pictured below)