Once it's installed, a panel can be displayed by typing
:UndotreeToggle that shows edits over time, and there's a diff panel which shows an overview of text changes.
I actually use a Mac a lot of the time, but whenever I find myself using another Unix I really enjoy tiled window managers like dwm. dwm.vim (GitHub: spolu / dwm.vim) by Stanislas Polu is a dwm-inspired layout manager for Vim.
Using this plugin splits the screen up into a large working area with a set of smaller stacks on the right. Creating a new window will make it use the larger space, and the previous windows will be stacked in the right-hand-side column. This is the default tiled layout, and it's the only layout at the moment but more could be added.