Creating a page of lines?

Hi, I would like to create a page of multiple lines for readers to write notes in the book. What’s the best one to do that in terms of formatting? I tried using the underline key, but the page didn’t compile right. Here’s how the like after being compiled:

Thanks for your help.

I’d say that you want to insert a table, and set it so that only the bottom border of each cell is visible. The table should span the entire width of the page (make sure to remove the initial paragraph indent for the line the table starts on).

Otherwise, you could just remove a few underscores from each line, as it looks like you just have 3-5 too many.