Thanks Bushi despite PPP's PythonScript panel is small, one can use only 10 *py in the panel, I know now we can use Alt+click to change the button and Ctrl+click to edit. And I understand now we don't have to clear all to retrieve the ones we need, just Alt+click for the one we don't need to replace with new one. I just thought if we can make it contain more ( like 20 ) buttons in the little panel, so as to expand it.