Use Indexing options to specify the contents of your search index.
| None | Do not include additional indexing options. | 
| Types | Include additional types of information in your Asset index. | 
| Properties | Include Asset serialized properties in your index. | 
| Extended | Include extended information in your index such as sub objects in Scene and Prefab Assets. | 
| Dependencies | Include Asset dependencies in your index. | 
| Keep | Use this option to save the created index as an Asset file. | 
| Temporary | Save the search index to a temporary folder that is not managed by Unity. | 
| All | Apply all indexing options. |