News Page <more...> function request

Would it be pissible to add a function to the admin that says something like: "automatically add <more> link to news summaries" ? Then the user could just click the box and you could automatically generate some PHP code to add a <more...> link to the detail page.

I know I could always paste something like this into each item:

<a href="<?php echo $record['_link'] ?>">read more....</a>

But, I seems like a common task that you could semi automate.

Thanks,