# Overview: Datablock Library

The Datablock Library is located on the left-hand side of the [Designer.](/overview-designer) From here, you can add Datablocks to your Databoards. The Datablock Library consists of two sections: the Visualization Library and the Metric Library.

## How to use the Visualization Library

If you want to start with a blank Datablock, you can either drag and drop from the Visualization Library or click a blank Visualization Type to add it to your Databoard. You can then use the [Datablock Editor](/overview-datablock-editor) to map this Datablock to a specific Data Source and Metric, select the most significant Date Range, change the comparison period, and more.

![visualization types](/assets/overview-datablock-library_1.483aaffe2110a19538a8f748e675c72580dc5fa0f1622a4477241d8d74147b13.ba843e8f.gif)Learn more about the Visualization Library [here](/overview-designer).

## How to use the Metric Library

The Metric Library consists of over 3,000 pre-built Datablocks based on commonly used Metrics and Visualization Types to help you build new Databoards faster.

![metric databoard](/assets/overview-datablock-library_2.f4da5a5293b821713ffd2a0562971a9b2fc9fd976510c70a998d4f5748ae6b56.ba843e8f.gif)Learn more about the Metric Library [here](/overview-metric-library).