I found the entry in the operator.css file to increase the spacing of the action buttons and I have located the PNG files for them in images/toolbar/

I have increased the size of the button graphics and that seems to work, but they now overlap the bottom of the toolbar area at the top of the screen.

Is there a better way to increase the button size besides directly increasing the size of the graphic?

How do I make the toolbar space at the top also increase in size?

Thanks!