Thank you blaineak :-) 

I must admit that software interface ergonomics is my passion.

In mine opionion TPF interface is good, but it could be better.

There is still a bunch of interface issues which annoy me.

When working on such project, you can't force all ideas you have. There are ressources imitations (limited number of programmers typing the code), and some software limitations making some ideas very costly (= almost impossible) to implemet. Also boss usually wants to have his final world in some topics  :-)

So as always, compromises had to be done.

By the way, I don't know what is the default user interface layout at this moment, but I find that layout showed above is the most handy when working in procedural mode (definition of plants with graph.  Please check if it helps you to have even smoother working experience with TPF. 

:-)