Comparing two files to identify differences can be a cumbersome task if done manually, but with tools like Notepad++, it becomes a simple and efficient process. Notepad++ is a popular text and source code editor for Windows which features the ability to compare files through an extension called Compare Plugin.

To start comparing two files in Notepad++, you must first ensure that the Compare Plugin is installed. If it’s not already installed, you can do so by using the Plugins Admin. Go to ‘Plugins’ > ‘Plugins Admin,’ search for ‘Compare,’ and then install the plugin.

Once the Compare Plugin is installed, open the two files that you need to compare in Notepad++. They can be opened in different views by dragging one of the file tabs to the other side of the window so that both files are visible side by side. This arrangement helps in visually spotting differences before actually running the comparison.

After you have both files open and ready, follow these steps:

1.Go to ‘Plugins’ > ‘Compare’ > ‘Compare’ or simply press Alt + D. This will initiate the comparison process.

2.The plugin will analyze both files and highlight differences line by line and side by side, making it much easier to spot discrepancies. Different colors denote various types of distinctions: added lines, deleted lines, changes within lines, etc.

3.You can navigate through differences using the toolbar buttons or menu: ‘Previous Difference’ (Alt+Up) and ‘Next Difference’ (Alt+Down).

4.You might want to configure how differences are displayed or tweak certain settings for comparison. To do so, go to ‘Plugins’ > ‘Compare’ > ‘Settings.’ Here you can adjust settings like ignoring case, ignoring spaces, etc., according to your requirements.

5.Once you have finished reviewing the differences, you might need to merge changes from one file into another. You can use manual editing or employ other Notepad++ features like copying a line up/down or moving it from one file to another.

6.After completing your comparison and merging tasks, clear the comparison highlighting by going on ‘Plugins’ > ‘Compare’ > ‘Clear Results’ or pressing Ctrl+Alt+D.

The intuitive interface of Notepad++ Combine with the robust features of Compare Plugin makes file comparison not only feasible but also a virtually effortless task. It’s essential for coders, writers, administrators, or anyone who works with text files that require regular audits for modifications or version control coordination.