Sometimes, a user would like to extract some target (i.e. a "Value") based on its surrounding text, which, in this feature one is called a "Key". FormX provides Key Value pattern matching to hep users achieve this. Say you are looking for some ID on a receipt which is always printed on the right side ofthe word "ID:", you can add a Key Value pair with "ID:" as the label and leave the position field unchanged as its default is "right". To boost accuracy, you can also enable fuzzy search and/or apply regular expression.