The Plant Symbol Conundrum

[dshall]

I see what you are talking about. I can control the "Cad Block" by layer or object, but when it is associated with the plant symbol it reverts to by object, which is fine but is not controlled
by layers unless you check " Use image settings". I have been using "Block settings"

So you now see that I am not getting what I want. But please note the symbol in the very first plan I posted....... I do get what I want with that one...... can you explain this? I can't.