You can automatically include some handy variables in your sessions, including:

• The starting tree name and ID.
• The last tree name and ID (may be different than the starting tree if you are using tree nodes).
• Location data for the end-user. 

To enable these special variables, do the following:

1. Go to the Settings tool, and click the Data tab.
2. Select the variables you want to include in future sessions.

The tree variables are:

• tree_name - the name of the starting tree.
• tree_id - the ID number of the starting tree.
• last_tree_name - The name of the last tree referenced in the session.
• last_tree_id - The ID of the last tree referenced in the session.
• container_url - For embedded trees, the URL that contains your embedded tree.

• Collecting Location Data