How can I make a Bézier curve have sharp and curved points? Like a zig-zag. And also being able to make more 'circular' parts too.
(I want to make fig 2, but I can only get to 1 by creating curves added with the E button.)
You can do this by going into edit mode, selecting a vertex and pressing S 0. This will make the vertex scaled to one single point, and it will cease to have an effect on the curvature of those segments.
The vertices are still selectable, moveable, etc.