Number of logical/data rows per screen in a multirow map. Note that this is related to the RowHeight property. The real number of physical rows in a list is a function of the RowHeight--if the RowHeight is 1 (one), then the number of logical rows equals the physical rows and you just need to count the number of rows displayed with the screen is "full" of list items. If RowHeight is greater than one, you only want to count the maximum number of "logical" rows per screen for this value.
Displayed when the FieldMap's Multirow property is "yes".