The method steps are as follows: 1. First turn on the computer, turn on the PS in the computer, then select a picture in the PS and drag it into the edit box.

2. Copy a new layer, press CTRL+J or right-click the copy layer. 3. Click the "Select" button, as shown in the figure, select the "Color Range" option in the drop-down menu, and click Open.

4. As shown in the figure, in the dialog box, first select "Sampling Color" and click the content to be matting with the tool pen. If we want to choose a font, click on the black font.

Then drag the color tolerance range to ensure that the font becomes clear. 5. After confirmation, the selected font presents the following state and is selected by dotted line.

6. Right-click Copy Layer or CTRL+J at this time. 7. Delete the redundant layers, and you will see that the latest layer has no background, only fonts. Then you can save it for later use.

2. How to extract the personal signature from the photo into the computer?

1. First, save the photographed signature on the computer.

2. Then open the signed picture with Photoshop. 3. After 3.Photoshop opens the picture, click to enter the channel mode.

4. After entering the channel mode, click the red channel to copy the red channel. 5. After copying the red channel, press the shortcut key Ctrl+L to bring up the color code interface.

6. Adjust the color scale of the picture to make the white one whiter and the black one darker, then select the copied red channel and load it into the selection, and then Ctrl+Shift+I will reverse the selection. 7. After deselecting, select RGB layer and return to the layer interface.

8. After returning to the layer, press the shortcut key CTRl+J to copy the signature separately. 9. Finally, select the signature layer copied separately, and export the PNG format quickly with the right mouse button.