When you select an object, or a group of objects, you can rotate them around an axis. ToeTag offers a few ways of doing this.
Keyboard
With your objects selected, press R. The selection will rotate around the best axis by 5 degrees (hold SHIFT to rotate by 15 degrees). In the 3D viewport, the best axis is always considered to be Yaw. In the 2D viewport, it will be whichever axis you are looking down.
Mouse
With your objects selected, hold down CTRL and MIDDLE_CLICK+DRAG. This will rotate your objects around the best axis which is determined in the same manner as the 2D viewport.
Pivot Point
By default, the editor will rotate the selected objects around their center location. If you want to manually specify a location to rotate around, hold down P and click in the 2D viewport. You’ll see a red cross appear that indicates where the rotation pivot is currently set.
To clear the pivot point, just press ESC.
Examples
OK, so let’s say we have some objects selected and we use standard rotation. This is what it would look like in the 2D viewport:
Now, when you place pivot points you get something very different and much more powerful: