You are correct. Non-members can post here. But when non-member questions become support in nature, we remind them about their membership so that we may give them support.
I was wondering if it is possible to put mosaic-like functionality on a secondary page (not the main page) of a different theme? And, if so, how to go about doing it?
In answer to your question, yes, you can use mosaic on any page. If you want a different theme then you do so via template manager.
Extensions >> Template Manager >> Save your template as a copy and rename >> Save
Assign the pages that you wish to follow the rules of your new template.
Hope this helps.
Nanci