To ease development I created a simple debug menu. It pops by pressing d, it can be disabled with the same key. It will always be above everything else and it works for calling Greta and in the overlay. A text can be typed in the box appearing in the left bottom corner, pressing enter or pressing the button will send the speech to Greta.
It does not check if a string is empty or if Greta is still talking, the developer has to decide when it wants to send speech. It's a debug function after all.
Feedback is welcome but will be 'processed' when I finished implementing the calendar plugin.