> 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/emedgene/emedgene-analyze-manual/variant-visualization/variant-visualization-tool/visual-aids.md).

# Visual aids

### Variant Highlighting <a href="#variant-highlighting" id="variant-highlighting"></a>

To assist in identifying and tracking genomic variants, the platform highlights variant regions with a light blue overlay in all relevant tracks. The highlight remains visible when zooming or panning and dynamically moves to newly selected variants.

### Reference Lines

To enhance clarity and facilitate a better understanding of genomic data, distinct reference lines are incorporated across various tracks, tailored to provide critical data points at a glance:

* **TNS Track:**
  * Grey dashed line at Y=0.0
  * Red dashed line at Y=-0.5
  * Blue dashed line at Y=0.5
  * Y-axis fixed range from 2.0 to -2.0
* **BAF Track:**
  * Grey dashed lines at Y=1.0, Y=0.5, and Y=0.0
  * Y-axis fixed range from 1.1 to -0.1
* **LogR (array only) Track:**
  * Grey dashed line at Y=0.0
  * Red dashed line at Y=-0.5
  * Blue dashed line at Y=0.5
  * Y-axis fixed range from 2.0 to -2.0


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