Thank you for posting here on the Community page, ranbyb2004. 

I'd be happy to guide you on how to see the list of specific memos in QuickBooks Online. Let me guide you how:

1. Click on the magnifying glass at the top center of your home page. 

2. Select the Advanced Search hyperlink below.

3. Filter your search by selecting Memo. 

4. Enter the memo you're looking for in the field and click on the Search button.

5. Select Settings (small Gear icon above the table), then select Memo/Desc.

I've attached a screenshot below that shows the last three steps.

I've added this article, in case you need to find transactions in a register in the future. It has all the list of the past and current transaction that you can review or edit them: Find, review, and edit transactions in account registers.

Keep in touch with me here should you need further assistance when managing your vendors' transactions in QuickBooks Online. I always got your back. Have a great day!