There are 2 methods to manually close a safe:
Method 1 - Closing All Safes
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Select the action: Close All from the main page. 
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All your Safes will be closed. 
Method 2 - Closing only a single safe
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Select a Safe from the Safes list. 
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Select the action: Close Safe from the main page. 
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Your safe will be closed. 
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