How to do it...

1. Download the installation package for one of the text editors listed previously.
2. Run the installation program for the editor and select the default settings.
3. Launch the text editor.
4. Open the hello.php file from the plugin directory of your local WordPress installation. You will see that different parts of the code are displayed in different colors based on the type of code.
5. Double-click on a word to select it. You will see any other instance of that same word highlighted across the file contents:

1. Select the View | Line Numbers menu item (or similarly named item based on your selected text editor) to display line numbers in the editor.