> For the complete documentation index, see [llms.txt](https://help.connected.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.connected.illumina.com/partek/partek-flow/user-manual/task-menu/post-alignment-tools/downscale-alignments.md).

# Downscale alignments

The **Downscale alignments** task can be invoked on data node containing bam/sam files, e.g. *Aligned reads* data node. The only parameter to specify is the percentage of the alignments to keep in the results, the range of the parameter should be between 0 to 100 (Figure 1). All the samples in the input data node will use the same parameter. The output data node contains bam files with a subset of the alignments.

<figure><img src="/files/djVo1lhWN1BGPoIjmxJP" alt="" width="375"><figcaption><p>Figure 1. Default filter alignments settings</p></figcaption></figure>

## Additional Assistance

If you need additional assistance, please visit [our support page](http://www.partek.com/support) to submit a help ticket or find phone numbers for regional support.


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