On visualizations that support it, Grafana sets default threshold values of:
* 80 = red
* Base = green
* Mode = Absolute
The **Base** value represents minus infinity. It is generally the “good” color.
## Add a threshold
You can add as many thresholds to a panel as you want. Grafana automatically sorts thresholds from highest value to lowest.
> **Note:** These instructions apply only to the Stat, Gauge, Bar gauge, and Table visualizations.
1. Navigate to the panel you want to add a threshold to.
1. Click the **Field** tab.
1. Click **Add threshold**.
1. Grafana adds a threshold with suggested numerical and color values.
1. Accept the recommendations or edit the new threshold.
* **Edit color:** Click the color dot you wish to change and then select a new color.
* **Edit number:** Click the number you wish to change and then enter a new number.
* **Thresholds mode -** Click the mode to change it for all thresholds on this panel.
1. Click **Save** to save the changes in the dashboard.
## Add a threshold to a Graph panel
In the Graph panel visualization, thresholds allow you to add arbitrary lines or sections to the graph to make it easier to see when the graph crosses a particular threshold.
1. Navigate to the graph panel you want to add a threshold to.
1. On the Panel tab, click **Thresholds**.
1. Click **Add threshold**.
1. Fill in as many fields as you want. Only the **T1** fields are required.
* **T1 -** Both values are required to display a threshold.
* **lt** or **gt** - Select **lt** for less than or **gt** for greater than to indicate what the threshold applies to.
* **Value -** Enter a threshold value. Grafana draws a threshold line along the Y-axis at that value.
* **Color -** Choose a condition that corresponds to a color, or define your own color.
* **custom -** You define the fill color and line color.
* **critical -** Fill and line color are red.
* **warning -** Fill and line color are yellow.
* **ok -** Fill and line color are green.
* **Fill -** Controls whether the threshold fill is displayed.
* **Line -** Controls whether the threshold line is displayed.
* **Y-Axis -** Choose **left** or **right**.
1. Click **Save** to save the changes in the dashboard.
## Delete a threshold
1. Navigate to the panel you want to add a threshold to.
1. Click the **Field** tab. (Or **Panel** tab for a graph panel.)
1. Click the trash can icon next to the threshold you want to remove.
1. Click **Save** to save the changes in the dashboard.
