Dragging and model equation for simscape blocks

Hi, I have 2 questions. The first. Concerning the example I have up-loaded. Is there a way to drag the blocks annotation in different positions with respect to above or below the block? Possibly more closer to the graphic?

Second question about the JFET: is it possible to have access to the modelled function in order to implement mathematical changes from the classical model? Thank you, gianluigi