Adding Printer
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4. Installing PrinterFirst, Launch the Printers Configure App 
 Simply Start Typing ‘printer’. Next Choose Add Printer 
 And Follow with the Wizard’s Setup… And finally, the Printer should be Successfully Enabled. 
Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }