Open the WPSOffice software on your mobile phone and log in to your account. Take the document as an example.

Open or create a new document. After entering the document, click Edit in the upper left corner to enter editing mode. When "Done" is displayed in the upper left corner, it means that we are already in editing mode.

Click on the tool in the lower left corner, then hold down the menu bar and slide to the left to select the brush.

After selecting the brush, set the brush type, brush color, brush thickness, etc., and use the finger function to turn it on. Then use your finger to write your signature in the document. If you make a mistake or make a mistake, click the return key above or the eraser tool below to eliminate it. Finally, click to disable the brush or turn off the finger function to exit the brush.

Or open wpsoffice, find the file that needs to be signed and open it. Click Edit to enter editing mode 3. Click the Tools button. Press and hold the navigation menu and drag it to the left to brush 5. Use your finger to open brush 6. Sign the corresponding position of the document, and then click the save icon.