alexleighton/kivy — comment on commit 16b3db3f0de768344be9fc1f2c4dc6bb002eaadb
File: doc/sources/guide/kvlang.rst line 14
By akshayaurora:

All widgets, by default, aren't drawable.

That changes the meaning too, I think. Actually every widget has its own Canvas as tshirtman explained, you can use it to draw by adding graphics instructions to it but by default it doesn't contain any graphics instruction, except for widgets like Button, label.

In the interest of keeping things consistent, "graphics instructions" seems a better fit than "drawing mechanism" as "graphics instructions" are used later in the documentation to refer to drawing instructions like Rect/Color... .