ClearMinimumsAndMaximums removes all minimum and maximum X and Y values from the calling Camera.
Code Example
The following code will set the minimum and maximum values on the Camera, then undo that setting, allowing the Camera to be positioned anywhere:
// Sets the minimum and maximum X values...
Camera.Main.MinimumX = 0;
Camera.Main.MaximumX = 1000;
// ... and this code undoes it:
Camera.Main.ClearMinimumsAndMaximums();