where can i find a more detailed tutorial on how to use snagit canvas

I am struggling with the limited information in the tutorials. I want to replicate the graphic shown in the tutorial about how to make a graphic for a presentation. But each time the presenter does something she does not say how she is doing, just do this, and this, and this. For example, how does each picture snap to the correct size when she drags in on to a canvas, how do you copy and paste a shape etc. is there more ifo somewhere please?