With Photoshopcc20 14 software, the method of building official seal is:
1, open ps software, "File-Open", open the picture and copy the layer;
2. "Selection-color range", click the red official seal with a straw, adjust the "color tolerance" and confirm;
3, ctrl+j copy and paste the layer, turn off the copy layer, copy the layer, "overlay", and use the "eraser tool" to erase some of the deducted handwriting;
4. "Edit-Fill" fills the "copy layer" with white;
5. "Layer-New Adjustment Layer-Hue/Saturation" adjusts the red color;
6. Further retouching with "daubing tool";
7. Open "Edit-Define Brush Preset" to preset the official seal as a brush, so that when you need to use the official seal in the future, open the brush tool, set the foreground color to red, and click where you need to use the official seal.