Without using VBA, the only way I can imagine doing this is to put all the
affected text and form fields into a table - consisting of a single cell,
where each line is a new paragraph. Then go to Table|Table
Properties|Cell||Cell|Options and check "Fit text".

The trouble with this is that the result will probably be very ugly. For one
thing, each line/cell will be adjusted differently. To achieve a
better-looking result I think you would have to ditch the table idea and use
VBA to adjust the text properties of the entire block of text so that every
line fitted without wrapping.

If you cannot move the fixed text /at all/ (e.g if you are printing onto a
pre-printed form with spaces), neother of those will work. To use the table
approach you would probably have to create a table with a complex layout
where each space in the form corresponded to one cell, and set the
properties of each of those cells. Not my idea of a stable approach though.
You shoud be able to use a macro approach but it would be more complicated.

As an aside, if I were a customer I might be quite put off by an information
form that presented so much info. to me in such a tight format.