# Form based GUI {#v4d_font_with_gui}

@prev_tutorial{v4d_custom_source_and_sink}

|    |    |
| -: | :- |
| Original author | Amir Hassan (kallaballa) <amir@viel-zu.org> |
| Compatibility | OpenCV >= 4.7 |

## Font rendering with form based GUI
Draws "Hello World" to the screen and let's you control the font size and color with a GUI based on FormHelper.

@include samples/cpp/font_with_gui.cpp

![The result](doc/font_with_gui.png)