How do I buy USD on PayPal?

As a cryptocurrency and finance professional, I'm often asked various questions regarding digital transactions. One such inquiry I've encountered recently is: "How do I buy USD on PayPal?" The asker seems to be interested in converting their PayPal balance or linked funds into US dollars. While PayPal primarily focuses on facilitating payments, not all users may be aware of the steps involved in directly purchasing currency within the platform. This query highlights a desire for clarity on the process of converting or acquiring USD through PayPal's services, likely due to the convenience and familiarity with the payment gateway.