Thank you for your help with this.
I really want to get to understand the MOG system as I really believe it is the way forward.
What I had been doing, for example, is placing existing, external walls within the mog by clicking the appropriate walls button until it can go no further or until the button turns red. I now stop before the red border appears on the button boundary.
I have seen somewhere else on one of the tutorials that there are five levels, the last being for hidden elements such as hiding lines! Could this red outlined button be for that reason?
With regard to the buttons, I would prefer to see where I am rather than where I could be.
Really like the idea of an ‘add MOG button’
I do quite like the idea of being able to switch to a 2D draughting area by the click of one button.