This parameter controls how the list items are displayed.
Possible Choices:
"flow"
This layout produces a very compact representation of the list. However, it may be rather difficult to read, especially when some items contain spaces.
This layout suits best for the lists containing long strings (particularly with spaces).
This representation suits more for the lists, whose items include strings with spaces.
However, when the list contains long strings, the two-column table may stretch far beyond the visible (printable) page width. In that case, the one-column layout suits better.
Also, the two-column layout may be not very good for big lists made of short word items (because it will occupy too much space). In that case the flow may fit better.