Odd. I finally got it to appear but the trick was to leave the cursor in one place and QUIT FIDGETING with it.
To reveal the ‘rollover’ text (for what it’s worth), bring the cursor from outside the strip’s boundaries and place it on any of the picture. The text disappears if the cursor is moved. To reinstate the text the cursor must be taken outside the perimeter of the pictures and brought back. The text message remains the same anywhere on page one. Page two has a different text.