#Custom Looker Visualizations
####Preliminaries:
- In order to utilize Looker's visualization plugin, a license feature must first be enabled. Use in-app chat, email support, or email a Looker analyst and ask them to turn on this feature. Once this is done, you will need to update your license key in the admin panel.
- At present, only on-premise (i.e., customer hosted) Lookers support custom visualizations. This is because one needs access to the file system to add and remove custom JavaScript.
- Looker's Customer Support team does not troubleshoot any issues that pertain to custom visualizations. Custom visualizations are a community supported effort. Please use issues for tracking and closing out bugs, and visit https://discourse.looker.com for how-to articles, conversations, and tips regarding custom visualizations.
####Getting Started:
Looker versions 3.14.xx and later ship with a directory intended to hold scripts for custom visualizations and other extensions. It is located on the machine hosting looker: ~/looker/plugins/visualizations. This is where you'll find our heatmap example to get you started. You will need to read and edit the heatmap example file to use it.
Once a custom visualiation script is saved in the above-mentioned directory, you can use it in the explore section or a dashboard by selecting it within the visualiation editor in list of additional visualiations (the ellipsis).
Which looks like this:
