Camera parameters
The Camera's parameters can be fine-tuned by clicking either on the Tool Panel's Parameters button or the camera settings icon shortcut:

You should then see the Camera Parameters panel open:

Various settings are available:
- The Format drop down menu allows you to load Camera size presets.
- Check the Preserve Proportion checkbox to keep the same ratio between the Camera's height and width upon changes.
- You can change the Camera's Pixel Aspect Ratio.
- You can change the way Fields are handled (3 settings are available: Progressive, Upper First and Lower First).
- You can add a 4/3 border or set a Safe Area.