(1) Custom shortcuts would be great for:
(A) a shortcut to go to next or previous result in the search pane would be nice.
(B) shortcut to toggle highlight search results would be nice
(C) shortcut to toggle the "find" box so it disappears the same way you can toggle advanced search pane
(D) toggling all menus/panes with one keystroke. e.g. it would collapse everything including advanced search, thumbnails, and bookmarks.
(E) Shortcut to toggle thumbnailview to maximized to sort pages easily.
In the search pane...
(2) The "only whole words" and "proximity" option would be nice to be able to make visible always in search pane, because it can be confusing when a search result shows 0 results if the user incorrectly thinks "only whole words" is unchecked or incorrectly thinks proximity is set to "same paragraph" when it is set to "adjent" instead. I'm no designer, but seeing the options here would be great:

(3) Aside from being able to see those options, ultimately, I would love to be able to set a custom shortcut that would toggle search "proximity" option (only words from same page, only words from same paragraph, etc). Thanks. : )
(4) I find the multi-colored search highlighting messy and not helpful. I'd prefer all search results were uniform in color using neon yellow so still easy to read. In this screenshot, the color of "Only two of..." would be ideal for all results. The multicolor becomes disorienting with lots of words!

THANKS!