Take the mobile banking of Bank of China as an example, the specific steps are as follows:
1. Open the mobile banking of Bank of China, enter the bank account number and password in the login interface, and click "Login".
2. After entering the homepage of the software, find and click "Account Management".
3. On the account management page, click "Electronic/Cash".
4. Enter the electronic cash management page, and click the ellipsis in the upper right corner of the page.
5. Go to more pages, find and click "Transaction Limit Settings".
6. On the transfer limit setting page, it shows that the "small amount/signature confidentiality" item has been opened, and click Enter.
7. Turn off the switch to the right of "signed small/confidential".
8. Click "OK" in the pop-up closing confirmation dialog box.
9. The function of "small/signature-free confidentiality" was closed successfully, and the button on the right side was grayed out.