User jumps to a dedicated layout for searching and automatically enters Find mode. Presses a button labelled "Search" which performs the Find and goes into Browse mode. This works fine.

Now the client wishes the label on the "Search" button to change its text, depending on the Window Mode — "Search" when in Find mode, "Start Over" when in Browse mode, which would re-initiate going back into Find mode. Excellent idea.

Created a Calc field which evaluates the Window Mode and returns the appropriate text. However, when in Find mode all fields go blank. Can anyone think of a workaround?

Much appreciated.

If you have a dedicated layout for searching, I don't understand which button on this layout is changing to "Start Over".

I usually have dedicated layout for Find, after a find the user lands at a list view (foundcount>1) or a form view (foundcount=1). If foundcount=0, then they're also sent to list view, and the script does a Show All Recs.