[chimerax-users] Change definitions of toolbar buttons?

Hi, Is it possible to change the definitions of toolbar buttons? Specifically, I’m thinking about the "save image” button, the idea of which I like very much, but which saves an image that is rather too low res for my taste. Can I redefine it so that it saves a higher quality image? More generally, will it be possible to create custom toolbar buttons, which execute an arbitrary ChimeraX command? Cheers Oli