This is the main part of the software, where you'll adjust the settings to correct at best your pictures.

Thoses settings are grouped in 8 palettes:
1. DxO Optics
2. Sharpness
3. DxO Noise
4. Color Balance and Exposure
5. DxO Color
6. DxO Lighting
7. Geometry
8. Crop
9. Presets

The highlighted icon on the right allow to show a before/after to see how a setting modify the resulting picture. The icone on its right allow to see the picture before processing.