Use Notepad ++ for many years, there has been no directory structure, due to the recent project information so expect more like EditPlus editor have the same directory tree to display the document.
But Notepad ++ has no built-tree features, but there are plug-ins can achieve this function.
Download Explorer plug-in can be achieved
step:
1. Unzip the downloaded file, copy the dll file to the plugin (plugins) under the notepad ++ installation directory directory
This step is to re-open the notepad ++ editor, you can already see 
If the previous steps not shown in FIG button, then in the following steps
2. Open notepad ++ editor, find the plug-ins (plugins) menu -> Plugin Manager -> show Plugin Manager
3. Switch to the Installed tab, check Explorer plug-in, click on the button to install reinstall
After a successful installation directory effects:
