I'm semi-homeless at the moment - having new flooring put in my condo, so the place is a mess. My PC is a prisoner in the kitchen, behind a sofa that completely blocks access! I'm posting from my (parked) car, using my phone as a hotspot.

I need to do a little tinkering to see if there's a clever way to do this. The catch is that there is only one CSS file for an album. So if the up-arrow is hidden on one page, it's hidden everywhere. And there's nothing internal that indicates whether a given page is a "level 0" (the top of the album), a "level 1," a "level 2," and so on. The page coding is all the same. I'd prefer to avoid hacking the skin templates....

Some experiments are called for.

Thanks for experimenting & tinkering with my question. I've played with it a little bit and, in doing so, re-evaluated the structure of each of my sites with the conclusion that changing would have little or no effect on making my sites any more user-friendly.

I have 3 sites
the simplest one has only 7 folders and is built from one project file. Best to use the KISS method here.
the other two sites have 6 folders each with a project file for the top level + 6 project files for the 6 folders (albums). Only a couple of folders could "possibly" benefit from the change in nav icons - so essentially unnecessary to make any alterations.

If the change I was suggesting could be accomplished with a simple CSS command - wonderful. But I was concerned that it could not be solved in this manner which you confirmed. Best to leave it as is and to use the wonderful tools you've already provided.

Thanks again - hope your project is completed and that you once again have access to your computer.