Probably most important however is that I can run previews of the toolpaths and the software can calculate the best path using various optimizations or change a tool quickly then re-calculate.
Before I can generate G-Code out of Fusion, I need to be able to draw in it. I am starting by drawing the stock I'm using to make the part out of.
Pro/Desktop which is was I first learnt. Everything can be drawn from constrained sketches which are then transformed. This means that if you've made a mistake in a sketch you can go back to it, fix the mistake and re-calculate all of the parts that are dependent on the sketch. Also being constrained you can make parts that will scale with only one change in dimension.
Keep an eye out for some chips coming soon.