Gojs textblock edit all the time

I have node gojs with textblock.
the textblock starts to edit on click the node.
I want the textblock to be in edit mode all the time, even if the node is not selected.
how can I do it?

Try setting TextEditingTool | GoJS API

$(go.Diagram, . . .,
    { . . .,
        "textEditingTool.starting": go.TextEditingTool.SingleClick,