Operating environment: Lenovo rescuer Y7000, windows 10 system.

1. Open PS, transfer the generated PDF file to the computer, and open it with PS. In the window that appears, just crop it to the (P) option and select the border. If it is a picture signature material, use Ctrl+O to directly select Open.

2. Click image rotation (g) in the menu bar image, and then click 90 degrees (counterclockwise) (0) to rotate the image. If the signature in the image is normal, the rotation operation will not be performed.

3. Ctrl+J copy a layer, then click Adjust in the image, click Threshold, and click OK directly in the subsequent window.

4. Click on the newly created layer and set its mixed layer mode to active superposition. Then right-click the layer and click Merge Visible Layers.

5.Ctrl+J copy the layer, turn off the visibility of the original layer (eye icon), click the magic wand tool, click the blank area of the image, establish the selection, and press the Delete key to delete all the white backgrounds except the signature in the layer.

6. Click the cutting tool and check the signature box.

7. Press Ctrl+Shift+S to select PNG format in the window that appears, and then save it to the desktop or other file. ? PNG format can display transparent background, but JPG can't.