on.update = function(dt)
	refresh_debug_animations()
	-- == menu area
	if Active_button and Active_button.expire <= Current_time then
		Active_button = nil
	end
	-- == settings area
	update_sliders(Global_state, App.mouse_x())
	-- == main area
	if Current_pane.editor_state.scrollbar_drag then
		adjust_scrollbar(Current_pane.editor_state, App.mouse_y())
	elseif Current_pane.output_editor_state.scrollbar_drag then
		adjust_scrollbar(Current_pane.output_editor_state, App.mouse_y())
	end
	-- never call edit.update; autosave is flaky on mobile devices
	if car.update then call_protected(car.update, dt) end
end