If your process has multiple approvers, when you enable the "Only 1 person needs to approve the transaction" option, your transaction will only need approval from 1 person. Here's how:
1. Go to Purchase module -> select Settings menu -> select Approval
2. Click on New approval setting button
3. Fill in the required fields and check on "Only 1 person needs to approve the transaction" option -> then click on Save button
4. Create a transaction that corresponds to the above approval process -> then click on "Send approval request" button
After pressing Send approval request, all approvers selected in the approval setting simultaneously receive approval request notifications via web and email.
5. One of them logs in --> then upload E-sign, enter reason and selects Approve / Reject, then the request changes to APPROVED / REJECTED status and the others can no longer approve this transaction.
Result: 
Finally, the transaction creator will receive web and email notifications about the status of the transaction.
