kidmarmite, I was wondering the same thing, until I realized that it used the "tables" feature that is only available in omnigraffle professional (I downloaded the pro version, and you do indeed get the ability to expand the table: a new little control appears on the table which gives you the ability to expand it. Not sure if it's worth $150 to me, but there you go).
ezraball on Rails DB Modeling — over 4 years ago
kidmarmite, I was wondering the same thing, until I realized that it used the "tables" feature that is only available in omnigraffle professional (I downloaded the pro version, and you do indeed get the ability to expand the table: a new little control appears on the table which gives you the ability to expand it. Not sure if it's worth $150 to me, but there you go).