You can open multiple files in the same Editor window. When you open an additional file, the Editor places the newly opened file on top of its stack of open files. You can then navigate through the open files using View > Next File and View > Previous File, or the toolbar buttons.
Shortcut: To quickly open a file, type the filename in the File field, and press Enter.
If the file is not located in the current directory, you must include the path.