When using Quad Draw, which option will allow you to snap your geometry to an underlying mesh?

On a rig, what would you use to change the orientation of an IK joint chain directly?

What is the hot-key to add a function or tool to a shelf tab?

What is the shortcut to simply change the background viewport colors?

What is the keyboard shortcut key used to add a shortcut for any tool from mesh, surface, animation, etc to the shelf.

What is the short command to change the main menu bar to animation ?