Start by selecting a playlist and choosing how you want to handle existing artwork:

The artwork is then automatically downloaded:

As the artwork is downloaded, you can browse through available results for each album by hovering your mouse over an album and clicking on the blue arrows:

If TuneSleeve did not find any artwork for an album or if the found artwork is not relevant, you can click on the search icon:

This will launch an image web search in your browser, allowing you to pick the exact artwork for that album and drag it directly on the album in TuneSleeve!