on.keychord_press = function(chord, key)
	assert(#Editors > 0)
	if chord == 'C-0' then
		initialize_editors( --[[font height]] 20, Editors[1].filename, Editors[1].screen_top1)
	elseif chord == 'C-=' then
		initialize_editors(Editors[1].font_height+2, Editors[1].filename, Editors[1].screen_top1)
	elseif chord == 'C--' then
		initialize_editors(Editors[1].font_height-2, Editors[1].filename, Editors[1].screen_top1)
	else
		edit.keychord_press(Editors[1], chord, key, --[[readonly]] true)
		resync_editors()
	end
end