Can you shortly explain, how to connect the editor with a canvas? I
didn't manage that trying to follow the help instructions:"Connect this patch and your GUI object through typing the receive and
send symbols of the object you want to edit."
all editing of gui objects works only through send messages. You must give
your canvas(es) a receive [and send] symbol first (if you don't have them
already). Then you must type that receive symbol in the receive symbol
field in cnv-edit. That's the connection of the patches.
English is not my mutter language (more like cousin language), if you want
you can suggest a simple phrase to explain how to make the connection.