lightdm-gtk-greeter How to have OnBoard keyboard auto show in greeter?

[littlemissmosfet]

I just read through the comments in the lightdm-gtk-greeter.conf. I'd like to have OnBoard keyboard auto show / pop-up without having to go to the upper right accessibility dropdown menu in the greeter panel. How to, please?

Failing this, is there a way to resize the greeter panel, make it larger?

Thanks!