Set the 'Can Grow' property to Yes. Reduce the vertical size to a hairline.
Thank you for the suggestion, Karl.
When I do precisely as you say (turn on Can Grow for all the text
boxes on the line, reduce their heights to hairlines and do the same
for the detail), all the lines disappear completely, the blank lines
and the data lines.
Amazed by this, I tried making the boxes just slightly taller. Then
some of the data disappeared, some remained!
Twip by twip I tried making the boxes slightly taller and changing to
report view. At some point, all lines reappear along with the blank
lines.
Thinking that maybe there was something wrong with the report, I made
a new, very simple report with just one of the text boxes. Same
thing.
Any other ideas?
John