Hi there, L10NGO. 

This may be because of screen issues. Let me assist you in fixing it.

As mentioned by my colleague above, make sure to update your QuickBooks to the latest release. Then, you'll want to change the display settings and adjust your view preferences in QuickBooks Desktop. This helps in resolving this behavior.

Another way is by running the repair tool. It's best to back up your company file first. You can check out this article on how to repair Adobe Reader/Acrobat.

In addition, QuickBooks Desktop has system requirements to ensure that you get the best experience. You'll want to check if this is the reason why your purchase order has that white space.

I've added this article to learn how to use and customize form templates in QuickBooks Desktop.

If you have more questions or need help with other concerns, please let me know the details below. I'll get back to this thread to help you out. Take care!