How to enable USD in PayPal?

Hello, I'm wondering about the process to enable US Dollars (USD) as a currency option in my PayPal account. I currently see several other currencies listed, but USD is not among them. Could you please guide me through the steps to add USD as a payment option? I understand that this may involve verifying my account information or linking a bank account in the US, but I'm not entirely sure how to proceed. Additionally, I'd like to know if there are any fees associated with adding or using USD in my PayPal account. Any detailed information you could provide would be greatly appreciated. Thank you for your assistance.