I am providing a general guide on how to forward Yahoo Mail to Gmail using the standard Yahoo Mail settings.

1. Sign in to your Yahoo Mail account.
2. Click on the Gear icon in the upper-right corner of the screen, and select "Settings" from the drop-down menu.
3. In the Settings menu, click on "Accounts" from the left-hand sidebar.
4. Click on "Add another mailbox" under "Email addresses."
5. Enter your Gmail email address and click "Save."
6. Yahoo will send a verification code to your Gmail address. Go to your Gmail inbox and retrieve the verification code.
7. Enter the verification code in Yahoo Mail, and click "Verify."
8. Return to the "Accounts" menu in Yahoo Mail, and select the Gmail account you just added.
9. In the "Forwarding" section, check the box next to "Forward Yahoo email to another email address."
10. Enter your Gmail address in the forwarding address field and click "Save."

From now on, any new emails that come to your Yahoo Mail account will be automatically forwarded to your Gmail address.

Please note that this is a general guide and the actual steps may vary depending on the specific version of Yahoo Mail that you are using. Additionally, you may need to adjust the settings in your Gmail account to ensure that the forwarded emails appear correctly in your Gmail inbox. If you don't want to perform the above lengthy steps, you can also use Sysinfo Yahoo Backup Tool.