Capítulo 4. Extending GNU Solfege
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## Capítulo 4. Extending GNU Solfege

## Introduction

GNU Solfege is written so that it can easily be extended, even if you do not know any computer programming. The steps are:

- Create a lesson file and save it it in the first directory listed when you select User Exercises from the File menu. Create the directory if it does not exist.

- Select User Exercises once again to see the file show up in the list.

- Click the link to your lesson file and enjoy!

To get started, you can copy one of the lesson files included in GNU Solfege. The lesson files are located in the `exercises/standard/lesson-files` subdirectory of the installation directory. You can find the installation directory by selecting File Locations from the Help menu. It is important to store the lesson files you create in the directory intended for user created lesson files, and not in the applications directory. This because all files in the installation directory may be removed while upgrading the program.

If you create many lesson files, you might want to group them together in a separate subdirectory and attach them to a front page file. This way you have a set of files in a subdirectory that you can easily distribute to other students. So create a new directory side by side the `user` directory you found by selecting User Exercises earlier this article. Your files might be structured like this:

    myfiles/myfrontpage.txt
    myfiles/lesson-files/chords-1
    myfiles/lesson-files/chords-2

To create a new front page file, you should select Edit Front Page from the File menu, and then click New on the toolbar of the dialog that pops up.

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