Camera Widget
The camera widget allows you to move the camera location without stopping any existing tool. Its usage is described here. You can use this option to disable it.
Widget Size
From the dropdown list choose from Small, Medium (default) and Large.
Hide and constrain mouse when dragging
This option effectively allows you to drag the mouse off the side of the screen. It is disabled if you are connected to Impact via Remote Desktop.
Misc
Enable camera transition animations
If this option is enabled, then whenever a keyboard, button or widget shortcut causes the camera to move from one position to another set position the movement is made with a smooth transition.