T-SMART FP789l-T OFFICIAL FIRMWARE: FLASH FILE TESTED 100%

You can edit HTML code using any text editor or integrated development environment (IDE) that supports HTML file editing. Some popular options include:

1. Sublime Text: A cross-platform text editor with syntax highlighting and auto-completion features.

2. Visual Studio Code: A popular, open-source code editor with a built-in HTML preview and debugging tools.

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3. Atom: A customizable, cross-platform text editor with built-in Git integration and a large library of plugins.

4. Notepad++: A free, open-source text editor for Windows that supports multiple languages and syntax highlighting.

5. Brackets: A lightweight, open-source code editor for web development with a live preview feature.

6. Dreamweaver: An Adobe web development tool that includes a visual editor as well as a code editor.

7.TrebEdit: A app, open-source code editor for web development with a live preview feature.

Once you have opened an HTML file in your chosen editor or IDE, you can edit the code directly in the editor and save the changes to the file.