Pinterest is not changing its grid-style design, but it is testing a makeover with a new navigation system, bigger images, and more related content on pins.

The popular pin-it Web site wants to enhance a few key components, such as making navigation faster and more intuitive, making pins bigger, and including more image details. Meanwhile, the new related pins side bar being tested aims to keep users clicking by tempting them with other boards.

"Pins are bigger and we've added more information related to pins, so it's easier to find things you're interested in," Pinterest software engineer Vy Phan wrote in an official company blog post announcing the new testing phase. "For example, on each pin, you'll see pins from the same board, other boards this pin was pinned to, and a whole slew of related pins."

The redesign is currently in testing with a small group of select users that can sign up to join. If the new look proves to be popular, everyone could get the new and improved Pinterest pretty soon.

The top of the site currently features a few navigation options, but users have to click a drop-down arrow to see a full list of categories. With the new design, however, Pinterest packs the navigation into a button on the top right. Once users click on that button, they will see options such as "Following Feed," "Popular Pins," and "Every Pin," as well as numerous categories to choose from.

The new style not only gives Pinterest a cleaner look, but it also makes users view the categories each time they navigate the site. This way, users are tempted to explore some more. It's all about keeping the user pinned to the site.

"In addition to the changes you can see, we also made some improvements behind the scenes that we hope will make things faster," adds the company blog post. "We'll preview the update with a small group of people over the coming weeks. Once we work out the kinks, we'll share it more broadly."

Pinterest users who are interested in getting early access to the design can fill out this form and become one of the early testers.