You can delete buttons that you don't use, like the up arrow on the background of the highest level stack.
Once you have HyperArchy customized, you might want to make a separate stack with cards that read the HyperArchy stacks for report generation, exporting, searching, etc.. Understanding of the linkage fields like "Parent ID", "Self ID", and "Child IDs" is important. By using these fields, all sorts of interesting collections of data can be made. Of course, if you are comptemplating this sort of thing, you must have made a start with HyperTalk!
One nice addition would be an assisted version for the Find Command. Otherwise, users can depend on the standard HyperCard Find facility.
Read the section "How HyperArchy Works" for more information and ideas.