Inyo

Have +50 hours into the game, and enjoy it, I really like that I can make automated ships to go mine and do other things however, the building is so very non-intuitive. I cannot make a ship that does not look like a shoe box. I have watched numerous videos on youtube about ship building and they always seem to have other things such as angled blocks showing up on their build menus than what I have. How did they make them appear? Please someone tell me what button I have to press to make a block something that is angled.