SpaceChem: Can I quickly reset a reactor?

I'd like to start anew with a reactor, scrapping all the current waldo programming. Can it be done? (I'm on a level with no top-level map, just a reactor. Not sure if that matters.)


Solution 1:

You can click-drag to select the whole play field and hit Delete.

Sadly there is no Ctrl-A to select all, or that would be the way to go.