Using Inside and Outside Masks within Keylight

I am trying to remove the sky and I have done it before, but it seems like keylight has new features? Or at least the masking tools have changed. Not sure if this is connected to what Premiere is doing but this is the biggest headache ever. Seems impossible to even deal with keylight anymore.

So I cannot find for the life of me how Inside and Outside masks work. Also is there a reason why vertices are the most difficulty thing to deal with it. Every time I want to deal with one point on my mask it selects the entire masks and it seems to have a mind of its own when it wants to release one point or select the entire mask. This program is the worst to deal with not sure why they made it super difficult to do anything within AE.

Any suggestions to either would be a huge help.