Bill Xi

## Motivation When using ```get_axis_label```, ```label.shift_onto_screen(buff=MED_SMALL_BUFF)``` will squeeze labels into the original pre-set frame radius. This is very inconvenient when working with a zooming camera frame. Therefore proposed to add...

Add setitem to mobject

1

## Motivation  We normally treat VGroup and mobjects as lists of submobjects. We should give them the same property like a list to get and modify a specific index...