Dealing with elements

With changes that have been made to my tests over the weeks, I have a number of elements in my project that are no longer used. I'd like to remove them (my elements repository has become large and cumbersome). So I suppose I have two things... First, when an element is not referenced in any tests/steps, right clicking on the element will show 'Delete' as an option. However, it doesn't work. I've tried selecting the element and using the delete key. That has no effect, either. So, how do I remove an element from my project? Also, I have some very busy web pages I'm testing. There are scores of elements on a single page. So I have quite a few elements listed in the project under the PageName. Sometimes Test Studio will add a new 'batch' of elements under PageName0 or PageName1. Fine - I can combine them (to a degree). But can I arrange them in logical groups that make sense to me? So rather than having 56 elements listed under a single page, I can have, say, 8 pertaining to search in a group and 11 list items grouped, etc.? That'd make the world a better place if I could. It would also make the world better if I could remove the dozens that have become orphaned over time.