# 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="https://1384254481-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJVEESmJAPppJ3ijFq5aR%2Fuploads%2Fgit-blob-b96b1a0f06755a83a44c7b523206b74875a3b769%2Fdownscalealignments-fig1.png?alt=media" alt="" width="375"><figcaption><p>Figure 1. Default filter alignments settings</p></figcaption></figure>

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