>>>To show 4 rows you use 4, 0 is the default, meaning it is 7 rows, but 7 is also seven rows non-default.
>>
>>thanks.
>
>So why didn't they just put 7 as the default, I wonder, that would seem to be more intuitive?

habit? i still have to look up some codes for various properties (some 0, 1; others 1,2 etc.)