Based on the screenshot you provided, it seems that you are trying to enable the copy-paste function for a specific page on a Shortform website. To do this, you can add the following code to the <head> section of the HTML code of the page you want to enable copy-paste:
HTML:
<meta name="referrer" content="no-referrer">
This code will disable the referrer header, which is one of the ways that Shortform websites prevent copying and pasting. By disabling the referrer header, you should be able to copy and paste content from that specific page.
Note that this code will only work for the specific page that you add it to. If you want to enable copy-paste for the entire website, you will need to add this code to the <head> section of every page on the website.