Create or Edit Icons

Just wondering if Icons are editable. I have this really nice icon to RunPythonScript, if I was into cloak & dagger.

I had to highlight an otherwise blank square for this image.

Cheers, Randy

in the Rhinoceros-> Commands-> Customize-> Tool Palettes dialog, drag&drop an image to the square shown in order to edit the icon…

Thanks Jeff, somethings are just too obvious sometimes.