1. Navigate to Setup and open the Object Manager and select Opportunity.
2. In the left pane, click Buttons, Links, and Actions.
3. Click New Button or Link in the top right corner to create a custom button.
4. In the left pane, go to Page Layouts.
5. Open an existing layout or create a new one using the button at the top right.
6. Under Buttons, find your newly created custom button.
7. Click and drag the button to the desired section of the page layout.
8. Click Save to apply and finalize your changes.
