# Alert Center
The alert center triggers alerts based on the lower threshold and upper threshold values for the defined dimension or measure.
## Creating a New Alert
* Click the ***Alert Center*** icon on the Storyboard.
* A new page opens prompting to subscribe alerts (the same screen also displays the previously Subscribed Alerts).
* Click the ***Create New Alert*** icon.
* The ***Alert*** window opens, displaying a list of the available Data Stores (Data Sources for the story).
* Use the Search bar to search for a Data store from the displayed Data Store list.
* Select a Data Store containing a time dimension from the list (An error message appears to notify the users if the selected Data Store does not contain a Time Dimension).
Select a Data Store to create a new Alert
* The following fields display to fill the required information when selecting a data store (data source):
* ***Title:*** Give a title to the created alert
* ***Dimension/Measures:*** Select a dimension or measure from the drop-down list
* ***Aggregation:*** Select an aggregation type from the drop-down list
* Time Field: Select a time field from the drop-down men
* ***Schedule Intervals:*** Select a time range to schedule the refresh intervals using the drop-down menu
* ***Lower Threshold:*** Set value as the lower threshold (the default value for this field is 0)
* ***Upper Threshold:*** Set value as the upper threshold (the default value for this field is 100)
* ***Max Good Value***: Enable/disable the ***Max Good Value*** by a checkmark in the box
* A Semi-Gauge chart displays the selected information on the right side of the screen with the value (E.g., in this case, the Semi-Gauge image displays a count of 35 Designations).
* Click the ***Save*** icon.
{% hint style="info" %}
*Please Note:*
* *The user can enable the **Aggregation** field only after selecting a Dimension/Measure field from the drop-down menu.*
* *The order of colors changes in Semi-Gauge from 'green-yellow-red' to ‘**red-yellow-green**’ by enabling the **Max Good Value** option.*
{% endhint %}
* The newly created alert gets added to the ***Subscribed Alert*** page.
* Click the ***Options*** icon for a Subscribed Alert.
* The ***Edit*** and ***Remove*** options appear.
## Triggered Alert
The triggered alerts display under the ***Alert Center*** with a brief explanation of the change in the set alert thresholds. The below-given image displays a triggered Alert.
## Display Alert History
* The user can click the ***Show History*** option given on the triggered alert.
Show History option for a Triggered Alert
* A page opens, displaying the information of previously triggered alerts.
{% hint style="info" %}
*Please Note:*
* *Choosing the **Edit** option redirects the* *users to modify the inserted values for Alert.*
* *A Click on the **Remove** option redirects users to remove the subscribed Alert together with the triggered alert.*
* *The **Show History** option displays only for the triggered alerts.*
{% endhint %}
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