> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mezmo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Add a Plot to a Graph

> Add additional data points to a graph to compare error levels and response codes using system fields and optional plot filters.

You can add additional data points to a graph as a way to compare data. Using the graph created in , you'll add additional plots showing other error levels.

1. Go to the graph created in [Create a Graph](/docs/create-a-graph).
2. Click **Add Plot i**n the lower-left corner of the graph\*\*.\*\*
3. For **System Fields**, select  **All Lines**.
4. For **Optional Plot Filter,** enter `response:404` to return all 404 codes.
5. Repeat steps 2 - 4 to add `response:>500` .
6. Click the **Save** button to add the new plot to graph
7. Change the line color by clicking on the colored icon beside the plot value.

<img src="https://mintcdn.com/mezmo-9a59581a/5cIdgEAM73o6sWZ8/images/docs/0oy6un9b4zvcwzj9a7363n8htpc1h4v0lb2vr5t9k5b0mj35mxo437pfbthp0jwz.png?fit=max&auto=format&n=5cIdgEAM73o6sWZ8&q=85&s=e99f34b2d106646f1f223aaf084a9c77" alt="" width="2090" height="1034" data-path="images/docs/0oy6un9b4zvcwzj9a7363n8htpc1h4v0lb2vr5t9k5b0mj35mxo437pfbthp0jwz.png" />

Next, you'll add a breakdown to show which app is creating the most error messages.