> For the complete documentation index, see [llms.txt](https://docs.finngen.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.finngen.fi/working-in-the-sandbox/working-with-genotype-data/tools-for-geno-pheno-explorations/example-visualizing-genotype-browser-output-data-with-tvt.md).

# Example: Visualizing Genotype Browser output data with TVT

With [Genotype Browser](/working-in-the-sandbox/which-tools-are-available/genotype-browser.md) you can select individuals based on a genotype you may be interested in and by importing them to the [Trajectory Visualization Tool](/working-in-the-sandbox/which-tools-are-available/trajectory-visualization-tool-tvt.md) (TVT) you can investigate the medical history of the individuals as a group of people.

#### Step 1.

Follow the **Steps 1-3** in this [example](/working-in-the-sandbox/working-with-genotype-data/tools-for-geno-pheno-explorations/example-transferring-data-from-genotype-browser-to-lifetrack.md) to download the data you want from Genotype Browser.

#### Step 2.

In order to examine the medical history of people with TVT, it is important to create [Concept Sets ](/working-in-the-sandbox/which-tools-are-available/atlas/detailed-guide/how-to-define-a-cohort-in-atlas/concept-sets.md)that include the medical codes you want to visualize. [These ](/working-in-the-sandbox/which-tools-are-available/atlas/detailed-guide/how-to-define-a-cohort-in-atlas/how-to-define-a-simple-icd-case-control-cohort-in-atlas/define-a-simple-icd-concept-set-in-atlas.md)instructions can help you with defining the Concept Set. You can visualize up to six Concept Sets at a time with TVT.

#### Step 3.

Open [TVT](/working-in-the-sandbox/which-tools-are-available/trajectory-visualization-tool-tvt/trajectory-visualization-tool-tvt.md) from **Applications**. From **Data sources**, select the appropriate **Data source**. Click `Browse...` from **Cohort as FINNGENIDs file** and open the `.tsv` file you have downloaded from Genotype Browser.

<figure><img src="/files/3L9vGRNl9zjuLq9ULBny" alt=""><figcaption></figcaption></figure>

#### Step 4.

After opening the file from Genotype Browser in TVT, open the **Encoding** section. Into the **Concept set**, type the name of the Concept Set you made in Atlas. Equip or unequip the **Non-standard** option according to if your Concept Set codes are [non-standard codes](/working-in-the-sandbox/which-tools-are-available/atlas/detailed-guide/code-sets-in-atlas.md) or not. After you are finished, press **Extract**. If you have more than one Concept Set to visualize, you can select every Concept Set into different blocks and press **Extract all**. For detailed instructions, see [Running TVT](/working-in-the-sandbox/which-tools-are-available/trajectory-visualization-tool-tvt/trajectory-visualization-tool-tvt.md).

<figure><img src="/files/bCcpAC4kbhSe72iB6cVG" alt=""><figcaption></figcaption></figure>

Now you are ready to inspect the medical codes within the Concept Set(s) with the help of [Viewing TVT results](/working-in-the-sandbox/which-tools-are-available/trajectory-visualization-tool-tvt/trajectory-visualization-tool-tvt/viewing-tvt-results.md).