I've hunted through the module files, but I can't find what I'm looking for. I want to set the default slide size. When you first configure a slideshow, the effect zone width defaults to 960 and height 420. I want to set those defaults so every time the client sets up a new slideshow, it will default to 970 x 500.

Also, how do I add this in such a way that I don't edit the md_slider files (in case there is an update to the module). Is there a file I can put in my subtheme folder?