Pick a shape. Click to pick the center, drag, then let go when it is the size you want. Move around to rotate it, and click to draw it.

• 挑选一个形状。点一下来决定形状的中心位置，然后持续拖拉它到你要的大小。绕著中心移动来旋转它，然后点一下把它画下来。