After a three-month test period with select members, Pinterest announced Monday that it will begin rolling out a new site design to the rest of its 48 million+ users.

The design changes are relatively subtle. In the newsfeed, amount of space bordering pins has been reduced to allow for larger images and a cleaner layout. Profile pages have likewise been condensed to show more pins in less space.

Here's a look at the old newsfeed (click to enlarge):

The new newsfeed:

The old profile page:

The new profile page:

Beyond the cosmetic changes, Pinterest has also added a host of discovery features. When you look at a pinned image or video, you can now see pins from the same board on the right-hand side so that you don't have to leave the page you're on to browse. You can also explore pins from the same source (i.e., website), and see what "people who pinned this also pinned."

These features are only available on the desktop for now, but will soon be rolled out to Pinterest's iOS and Android apps, says Jason Wilson, Pinterest's lead product designer.

To get access to the redesign, head over to your newsfeed and look for the "Preview our new look" box in the upper lefthand corner. You can switch back to the old design at any time by pulling up the drop-down menu under your profile name on the top nav bar.

Screenshots courtesy of Pinterest.