In reviewing a journal entry, how does one change the column width so that more of the posting account name is visible?

I'm happy to assist you with changing the width of your Journal Entry (JE), David. 

I know how important ensuring the name of the posting account you've created the JE for. 

Let me show you how: 

1. Go to Journal Entry. 
2. Hover your mouse to the line between Account and Debits. 
3. Resize the width the way you like.

Moreover, let me share these articles that can help you manage your Journal entries in the future: 

• Reverse or delete a journal entry in QuickBooks Online
• Print a journal entry report in QuickBooks Online
• Record a returned or bounced customer check using a journal entry

Keep me posted if you still have questions about your Journal entries. Have a great day, and take care.