Currently, there isn't an option to view the memo in the Pay Bills window. As an alternative, you can consider opening each transaction to review it.
I can see how beneficial it is for you and your business to have this option. But I want to let you know that your voice matters and I'm submitting feedback directly to our product engineers for consideration.
For now, you can visit our blog site so you'll be able to get the latest news about QuickBooks and what our Product Care Team is working on.
Please keep in touch if there's anything else I can do to help you succeed with QuickBooks. I've got your back. Have a great day.