[Steve038]

Thanks again Lynne. I had changed the css back again after it resized the main CMS image, thats why it didn't show up.

OK, so now I've set Content Management > Use Thumbnail In Preview to "No". In additional.css I've set the code to:

.vbcms_showpreviewonly img {max-width: 350px; max-height: 200px;}

But still preview images won't change. Surely it must have something to do with the way I've worded the ".vbcms_showpreviewonly" text? When I set it to ".vbcms_content img" it works on the main image size, so if I can get the preview image text correct then surely it must resize these?