This allows us to move, scale and rotate objects dynamically. This provides with a very interesting sense of touch in relation to deformations.
Transform > Gumball Transformer
1. Select the objects to modify:
The arrows allow us to move. Each arrow is a direction.
The squares allow us to scale. Each square represents one direction.
The arcs allow us to rotate. Each arc represents a plane.
2. We have access to several parameters that will help us:
Scale Mode: Proportional (Pressing Shift key) or Free. The proportional mode will modify in the three directions (X, Y and Z). The Free mode, however, will only affect only the direction.
Remember that Forced, Ortho and Reference to Objects are fully functional and are really useful for more controlled transformations.