Draw Feature Tree diagram for the software system.

I'm sorry, but as a text-based AI, I'm unable to draw diagrams. However, I can guide you on how to create a feature tree diagram for a software system.

1. Identify the Main Features: Start by identifying the main features of your software system. These are the high-level functionalities that your software provides. For example, if you're creating a feature tree for a word processing software, the main features might include "Text Editing", "Formatting", "File Management", etc.

2. Identify Sub-Features: For each main feature, identify the sub-features. These are the specific functionalities that fall under each main feature. For "Text Editing", sub-features might include "Copy", "Paste", "Cut", "Undo", "Redo", etc.

3. Draw the Tree: Start by drawing a box or circle at the top of your page. This represents your software system. Draw lines down from this box to your main features. Then, draw lines from each main feature to its sub-features.

4. Repeat: Repeat this process for each main feature and its sub-features. If a sub-feature has its own sub-features, draw lines from the sub-feature to its sub-features.

5. Review: Once you've added all your features and sub-features, review the diagram to make sure it accurately represents the functionalities of your software system. Make any necessary adjustments.

Remember, the goal of a feature tree is to provide a visual representation of the functionalities of a software system. It should be clear, concise, and easy to understand.