Printing scroll bars

Hi,

I’m trying to print a modal checklist using the external print trigger process (https://spacedonkey.de/4188/print-o-matic-external-print-trigger-target-by-class/), but when I click the button Print Trigger, the print page shows just a slice of the page with the scroll bars.

I just want to print a clean checklist as the modal is showing.
Does anybody help me?

Check out the pictures.
https://postimg.cc/gallery/sy8ykP5

Thank you!!!!
Eduardo

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