NERDTree is a handy plugin that emulates modern IDE behavior by displaying a file tree in a split buffer to the side of the screen. NERDTree is available from https://github.com/scrooloose/nerdtree (see Installing Plugins earlier in this chapter for installation instructions).
Once installed, you can invoke NERDTree by typing the following:
A list of files in a directory will show up:
Use h, j, k, and l or the arrow keys to navigate the file structure, and Enter or o to open the file. There are multiple useful shortcuts, and Shift + ? brings up a handy cheat sheet.
A notable feature is bookmark support, ...