I'm fairly new to Silverstripe and only recently discovered that you don't edit template files that come with modules, but copy the ones you need to your default template path and edit the copies there. Am I right in thinking this does not apply to CSS files?
Today doing new install of image gallery I moved the default /image_gallery/css/ImageGallery.css to themes/mytheme/css/ but this does not appear to work.
Clarification appreciated please
Thanks