Values that specify the flow of the thumbnail images.
| Value | Member | Description |
|---|---|---|
| 0 | LeftToRight | The thumbnails start flowing from left (column-0) to right (number of columns -1), and then start again from left (column-0). |
| 1 | TopToBottom | The thumbnails start flowing from up (row-0) to bottom (number of rows -1), and then start again from left (column-0). |