Chunk & Line Staging

One of the things that make Git such a great tool is the ability to craft granular commits. With Git's staging area, you can determine which changes exactly you want to have in the next commit. Tower takes this one step further by allowing you to determine the exact chunks and even lines you want to add:

Select a changed file in the Working Copy list. In the diff view on the right, you can then select the exact chunks & lines you want to add to the next commit.