There's no longer a button right on the It's Me 247 page, but assuming you're on a device with a mouse, with most browsers you can right-click on a page and choose Print to produce a very nice looking, printable list of transactions. Your browser's print controls can even let you change the magnification percentage, margins, and other settings.
Hint: It can make a difference where you are pointing when you click, so if the menu that appears on a right-click doesn't have a Print option, try moving to another area within that same page. For example, if you right-click on a transaction in the list, you get a different set of options then if you click on the slightly darker-gray border area around that clickable link.