crm-rush/api/soft/smarty/4.5.2/docs/programmers/api-variables/variable-debugging.md

$debugging

This enables the debugging console. The console is a javascript popup window that informs you of the included templates, variables assigned from php and config file variables for the current script. It does not show variables assigned within a template with the {assign} function.

The console can also be enabled from the url with $debugging_ctrl.

See also {debug}, $debug_tpl, and $debugging_ctrl.