For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
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So you mean id. Well create calc element, write in it and show in list (on the first place):
global $x;
$x=$x+1;
return $x;
And where must I write that script , and how to made a calc element.
First of all look at:
http://fabrikar.com/forums/index.php?threads/calculated-value-in-display-element.34492/
If I understand you correctly what you need is list view with order numbers for printing. There is not print option for list view (except CTRL+P). You can also export list to Excel and format view with that software.
To get good order for each record look at: