Kirk,
Thanks for the response.
To clarify, I wasn't talking about anything radical. I was just thinking that a click on the text "View by" would bring up exactly the same selection choices, in the same manner, as a click on its corresponding 'icon' ("Filter View by"). I do see your point that extra programming would be required to have the slider "Set Thumbnail Size" comform.
Upon further use, what seems even more useful to me, and maybe others who value screen real estate on 19 inch or less monitors, is a keyboard shortcut for "Hide Toolbar" (i.e., the Tab key does not appear to be used and serves a related purpose in other graphics apps).
Thanks again,
Byrne