> For the complete documentation index, see [llms.txt](https://academy.dnanexus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://academy.dnanexus.com/cohortbrowser/how-to-create-cohorts/gene-expression-filtering.md).
# Gene Expression Filtering
To filter with gene expression data, you can add a filter based on the tiles created in the Gene Expression tab or use the “+ Add Filter” button in the Cohort Banner.
## **These filters allow for:**
* Assessing impact of genes/ features and their expression levels
* Building Cohorts based on Gene Expression Level
## **You Can Filter By:**
* Gene Symbol or Ensembl ID with Expression Level
## Adding Gene Expression Filters
1. Add in your dataset
2. Select "+ Add Filter"
3. Select Assays and then under Gene Expression, select “Features/ Expression”
4. Select the genes that you want as well as the expression range. Please note, for the Gene/ Feature value, you can select by Gene Symbol or the ENSEMBL ID.
## Supplemental Video for Gene Expression Tab and Filtering
{% embed url="" %}