drawing substitution window in own workspace

I want to build my own workspace - it works.
But I can not make a ‘drawing substitution window’ in my own workspace’ in the new workspace. Is it possible to do that?
Thank you

My own answer for people who should have the same problem: Because I find no way in an own workspace a ’ drawing substitution window’ to add, I am developing my workspace from the ‘Animating’ workspace (where it is already included).

Yes, now, i see this. Thank you.

There is no “drawing substitution” window, because this is a part of the Library window. So if you want to add it, look for Library.