How do I manipulate my coasters

I would like to know If there already is a way to manipulate loops and other rolls in the coaster editor.

Things I'd like to see are:

Half loops and corkscrews
The possibility to resize loops and such
The possibility to manipulate loops and such (like the blue coaster in the Saltlake Valley example park)

Maybe I'm too much ahead of things but I'm just so exited for building rollercoasters