Defines the type of the thumbnail.
| Member | Value | Description |
|---|---|---|
| MFThumbnailTypeClassic | 0 | Classic square thumbnail, or icon if no thumbnail available. |
| MFThumbnailTypeClassicNoIcon | 1 | Classic square thumbnail, no icon if no thumbnail. |
| MFThumbnailTypePreview | 2 | Preview thumbnail in aspect ratio. |