| Name | Value | Description |
| kActiveComponentIsoViewOnSave | 79874 | The isometric view of the document is set as thumbnail on save. |
| kActiveWindow | 79876 | The currently active view is immediately set as thumbnail. |
| kActiveWindowOnSave | 79875 | The active view of the document is set as thumbnail on save. |
| kImportFromFile | 79877 | The specified image file is set as thumbnail. |
| kNoThumbnail | 79873 | No thumbnail is set. |