# Where are the sequences and plate positions of Illumina indexes?

The [Illumina Adapter Sequences Document](https://support.illumina.com/downloads/illumina-adapter-sequences-document-1000000002694.html) contains the sequences of all Illumina indexes. The plate layouts/well positions for pre-plated indexes are in the [Index Adapters Pooling Guide](https://support.illumina.com/downloads/index-adapters-pooling-guide-1000000041074.html).

Illumina recommends creating sample sheets in Illumina Experiment Manager (IEM) or setting up runs in Local Run Manager (LRM), BaseSpace Run Planning, or BaseSpace PrepTab depending on the instrument and control software version.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #7378), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000007378%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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