question, selection
when i don´t want to use the outliner, how can i select certain objects, which are laying at the same place?

question, cv-curve to polygon
i´ve draw a cv-curve. i don´t know if it is closed. now i want convert it into a polygon-object with a certian object-heigh.
i´ve tried to convert it to planar, but i can´t extrude a surface.
i´ve also used the command nurbs to poly, but i can´t extrude a surface too.
how to do it right? which is the best workflow?