ZBrushCentral

Two Questions

1 - when using an IM or IMM Brush how do I deactivate it or turn it off after drawing out the design
so I can draw out another one and repeat. Right now with curve on most of the time the IM or IMM
rush want turn off (I do use weld).
What do I need to do draw out with IM or IMM Brush then draw another?

EDIT - I figured out question 2

Click somewhere on the masked part of your mesh to draw a new one.
or
Stroke-Curve Funktions-Delete

Thanks stone3d