is there a proper way in FPW 2.6 to add a line to the end of a memo?

is there a recommended way in FPW 2.6 to add a line to the end of a memo field?    I have been using :  replace memo_field with memo_field + new_line  and every once in a while the FPT file  blows up to a large size  (2 or 3 times normal size).   I'm guessing it blows up because someone uses a utility to add a line to a large number of records at once.

Is there a command that prevents the bloat?

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