It isn't hidden, stupidusername.

QuickBooks is available in two versions: QuickBooks Desktop (QBDT) and QuickBooks Online (QBO). The QBDT platform is installed locally and has a vastly different function than the Online version which is cloud-based. 

The largest differences between the two platforms are found in their features. Some feature is in QuickBooks Desktop isn't available in QBO and this includes the button to open the check register. You can run the Check Detail report to see those printed checks and from there you can open the transaction to print it.

You can follow the steps provided by my colleague above to reprint the check or visit this article for more information: How to reprint checks and sales forms

Additionally, you may also customize your report to see only the data that matters to you.

Feel free to drop by anytime if you have other questions. We're always here to assist you.