By default, orders are sent to production one hour after they are placed. However, if you prefer to process your orders manually, you can adjust the settings accordingly. With manual processing, you can set a hold time of your choice.
The hold time begins when the order is placed, and you can cancel it anytime during this period. Once the set hold time has passed (e.g., 3 hours), the order will be processed automatically, and cancelation will no longer be possible.
1. Access Stores from the dashboard, click on the three dots on the right, then click on Settings.
2. Scroll down to Selling Preferences, select Delayed to set up a custom time, after which your order will automatically go into production, e.g., 60 minutes. 
Tip: If you're not ready to start the hold time countdown, you can save the order as a draft first. This way, the order won’t be placed or enter the hold period until you’re ready to finalize and submit it. See more info here: Can I save a manual order as a draft?