The location of the Parallel Book Sets icon needs a higher priority (i.e., ought to be further to the left) than the icons for visual filters, or factbook tags. It becomes a problem on a narrow screen, especially a touch screen, where left and right arrows cannot be used. When the screen is narrow (I notice it on a Microsoft Surface in vertical mode with two panels open) the parallel book set icon disappears. Without a keyboard there isn't any way to switch to a different Bible translation using parallel book sets.
I can much more easily do without the Factbook tags toggle, or the Visual Filters icon, than the Parallel Book Sets feature. There is probably some variety in what people want prioritized in this respect, but my preferred priority (left to right) is 1) left/right arrows (except they take a lot of space, so maybe not), 2) search (just because it looks like it belongs there logically, not because I use it the most), 3) parallel resources, 4) interlinear toggle, 5) visual filters, 6) factbook toggle, 7) multiple books display.
If Logos doesn't want to change the relative positions of these icons, how about letting us put them where we want them? I wouldn't suggest dragging and dropping, because it's too easy to move something when you merely intended to click on it, but there could be a location order in preferences, for example.
By the way, I never use the Equivalent Books icon. If the books are actually equivalent (e.g., different copies of the KJV Bible, for example), why change? I don't see the purpose of Equivalent Books. It's a waste of valuable real estate and constitutes unnecessary clutter in my opinion.
