Explorer
Use the File Explorer to browse, open, and manage files in the selected directory within your project.

the File Explorer, displaying files inside the TESTS directory
If you don’t have a file open, clicking the Explorer button will show you a list of files in the project’s home directory. If you are working on a file, clicking Explorer will show a list of files in the directory containing the selected file.
There are three main parts to the Explorer view.
Search bar
Toward the top of the window is the Search bar. It includes a search box to allow you to filter the list of displayed files, a New button for creating a file, the path and directory whose files are displayed, and a box for entering a short Terminal command to be run by the linux shell.
List of files
The main part of the File Explorer window is taken up by a list of files. Clicking the check box next to one or more files allows you perform file actions.